The disclosure relates to trays for segregating liquid in a reservoir space distinct from a storage space. The trays include a body having a floor and a platform spaced away from the floor and bearing at least one orifice or gap extending therethrough for facilitating fluid flow from the storage space into the reservoir space under the influence of gravity. The gaps and/or orifices are relatively centrally located, which tends to inhibit retrograde flow of fluid from the reservoir space into the storage space. The platform can include one or more deflectable doors defined by elongated gaps. Deflection of a door, such as by a protrusion extending from the body, opens the door-defining gap into a larger opening to facilitate fluid flow. The platform can also have one or more adaptors and/or sockets for securing its position relative to the floor.
B65D 81/26 - Adaptations for preventing deterioration or decay of contentsApplications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, fluids, e.g. exuded by contentsApplications of corrosion inhibitors or desiccators
The disclosure relates to trays for segregating liquid in a reservoir space distinct from a storage space. The trays include a body having a floor and a platform spaced away from the floor and bearing at least one orifice or gap extending therethrough for facilitating fluid flow from the storage space into the reservoir space under the influence of gravity. The gaps and/or orifices are relatively centrally located, which tends to inhibit retrograde flow of fluid from the reservoir space into the storage space. The platform can include one or more deflectable doors defined by elongated gaps. Deflection of a door, such as by a protrusion extending from the body, opens the door-defining gap into a larger opening to facilitate fluid flow. The platform can also have one or more adaptors and/or sockets for securing its position relative to the floor.
The disclosure relates to trays for segregating liquid in a reservoir space distinct from a storage space. The trays include a body having a floor and a platform spaced away from the floor and bearing at least one orifice or gap extending therethrough for facilitating fluid flow from the storage space into the reservoir space under the influence of gravity. The gaps and/or orifices are relatively centrally located, which tends to inhibit retrograde flow of fluid from the reservoir space into the storage space. The platform can include one or more deflectable doors defined by elongated gaps. Deflection of a door, such as by a protrusion extending from the body, opens the door-defining gap into a larger opening to facilitate fluid flow. The platform can also have one or more adaptors and/or sockets for securing its position relative to the floor.
A47J 47/10 - Closed containers for foodstuffs for non-granulated foodstuffs with arrangements for keeping fresh
B65D 81/26 - Adaptations for preventing deterioration or decay of contentsApplications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, fluids, e.g. exuded by contentsApplications of corrosion inhibitors or desiccators
The disclosure relates to forming shaped thermoplastic articles having smooth peripheries. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet. Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region separated from the potentially sharp peripheral edge by a spacer, deflecting a portion of the deflectable flange, and softening at least one bent portion of the deflectable flange to yield a smooth periphery upon cooling. The deflection can include curling the spacer at or near the peripheral edge. The methods can be performed incrementally and/or in a reciprocating fashion.
The disclosure relates to plastic containers which can be wrapped in and/or contacted with plastic films such as cling films. The containers contact the film at least one surface that is texturized sufficiently to reduce friction (i.e., reduce resistance to slippage of the film across the texturized surface). Owing to the reduced resistance to slippage, the film can move relative to the portion of the container which it contacts, such as when the film rubs against another object. Such relative movement facilitates stretching or displacement of the film and reduces tears, necking, and holes in the film when a film-wrapped container contacts other objects. As a result, line speeds can be faster and less care can be exercised in packing and other handling operations. The texture can be conferred to one or more portions of the container during molding, or prior to or after molding.
The disclosure relates to plastic containers which can be wrapped in and/or contacted with plastic films such as cling films. The containers contact the film at at least one surface that is texturized sufficiently to reduce friction (i.e., reduce resistance to slippage of the film across the texturized surface). Owing to the reduced resistance to slippage, the film can move relative to the portion of the container which it contacts, such as when the film rubs against another object. Such relative movement facilitates stretching or displacement of the film and reduces tears, necking, and holes in the film when a film-wrapped container contacts other objects. As a result, line speeds can be faster and less care can be exercised in packing and other handling operations. The texture can be conferred to one or more portions of the container during molding, or prior to or after molding.
B65D 21/04 - Open-ended containers shaped to be nested when empty and to be superposed when full
B65D 53/00 - Sealing or packing elementsSealings formed by liquid or plastic material
B65D 71/06 - Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottlesBales of material comprising a plurality of articles completely or mainly held together by packaging elements, e.g. under tension
B65D 75/36 - Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet or blank being recessed and the other formed of relatively stiff flat sheet material, e.g. blister packages
B65D 88/42 - Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle
8.
CONTAINER HAVING WRAP-RELEASING TEXTURIZED SURFACE
The disclosure relates to plastic containers which can be wrapped in and/or contacted with plastic films such as cling films. The containers contact the film at at least one surface that is texturized sufficiently to reduce friction (i.e., reduce resistance to slippage of the film across the texturized surface). Owing to the reduced resistance to slippage, the film can move relative to the portion of the container which it contacts, such as when the film rubs against another object. Such relative movement facilitates stretching or displacement of the film and reduces tears, necking, and holes in the film when a film-wrapped container contacts other objects. As a result, line speeds can be faster and less care can be exercised in packing and other handling operations. The texture can be conferred to one or more portions of the container during molding, or prior to or after molding.
The disclosure relates to forming shaped thermoplastic articles having smooth peripheries. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet. Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region separated from the potentially sharp peripheral edge by a spacer, deflecting a portion of the deflectable flange, and softening at least one bent portion of the deflectable flange to yield a smooth periphery upon cooling. A liner sheet may be attached to the feedstock sheet prior to, during, or after forming and can be peelable therefrom.
A reinforced Gaylord container is provided storage and transport, including stacked storage on a pallet. A core is provided for supporting a majority of a vertical load on the container, instead of such load being delivered to sidewalls. A positioning insert is provided for positioning the core within the container. A plurality of such containers may be placed on respective pallets and stacked.
B65D 5/44 - Integral, inserted or attached portions forming internal or external fittings
B65D 19/00 - Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
B65D 5/00 - Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
The disclosure relates to forming shaped thermoplastic articles having smooth peripheries. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet. Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region separated from the potentially sharp peripheral edge by a spacer, deflecting a portion of the deflectable flange, and softening at least one bent portion of the deflectable flange to yield a smooth periphery upon cooling. The deflection can include curling the spacer at or near the peripheral edge.
B29C 43/02 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor of articles of definite length, i.e. discrete articles
The disclosure relates to forming shaped thermoplastic articles having smooth peripheries. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet (e.g. following thermoforming). Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region separated from the potentially sharp peripheral edge by a spacer, deflecting a portion of the deflectable flange, and softening at least one bent portion of the deflectable flange to yield a smooth periphery upon cooling. A liner sheet may be attached to the feedstock sheet prior to, during, or after forming and can be peelable therefrom.
B29C 51/14 - Shaping by thermoforming, e.g. shaping sheets in matched moulds or by deep-drawingApparatus therefor using multilayered preforms or sheets
The disclosure relates to forming shaped thermoplastic articles having smooth peripheries. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet (e.g. following thermoforming). Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region separated from the potentially sharp peripheral edge by a spacer, deflecting a portion of the deflectable flange, and softening at least one bent portion of the deflectable flange to yield a smooth periphery upon cooling. A liner sheet may be attached to the feedstock sheet prior to, during, or after forming and can be peelable therefrom.
B29C 51/14 - Shaping by thermoforming, e.g. shaping sheets in matched moulds or by deep-drawingApparatus therefor using multilayered preforms or sheets
Recyclable commercial packaging materials, namely, thermoformed plastic trays; recyclable fitted plastic inserts for use as container liners; recyclable plastic containers and covers for the food industry; recyclable plastic trays for foodstuff packaging
Commercial packaging materials, namely, thermoformed plastic trays; Fitted plastic inserts for use as container liners; Plastic containers and covers for the food industry; Plastic trays for foodstuff packaging
The disclosure relates to forming shaped thermoplastic articles having smooth peripheries. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet. Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region separated from the potentially sharp peripheral edge by a spacer, deflecting a portion of the deflectable flange, and softening at least one bent portion of the deflectable flange to yield a smooth periphery upon cooling.
The disclosure relates to forming shaped thermoplastic articles having smooth peripheries. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet. Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region separated from the potentially sharp peripheral edge by a spacer, deflecting a portion of the deflectable flange, and softening at least one bent portion of the deflectable flange to yield a smooth periphery upon cooling. A liner sheet may be attached to the feedstock sheet prior to, during, or after forming and can be peelable therefrom.
B32B 3/26 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layerLayered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a layer with cavities or internal voids
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
B29C 51/14 - Shaping by thermoforming, e.g. shaping sheets in matched moulds or by deep-drawingApparatus therefor using multilayered preforms or sheets
B29C 51/26 - Component parts, details or accessoriesAuxiliary operations
B65D 53/06 - Sealings formed by liquid or plastic material
B32B 7/06 - Interconnection of layers permitting easy separation
The disclosure relates to forming shaped thermoplastic articles having smooth peripheries. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet. Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region separated from the potentially sharp peripheral edge by a spacer, deflecting a portion of the deflectable flange, and softening at least one bent portion of the deflectable flange to yield a smooth periphery upon cooling.
B65D 1/26 - Thin-walled containers, e.g. formed by deep-drawing operations
B65D 81/20 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
B65D 21/02 - Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together
B29C 51/08 - Deep-drawing or matched-mould forming, i.e. using mechanical means only
B65D 1/42 - Reinforcing or strengthening parts or members
The disclosure relates to forming shaped thermoplastic articles having smooth peripheries. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet. Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region separated from the potentially sharp peripheral edge by a spacer, deflecting a portion of the deflectable flange, and softening at least one bent portion of the deflectable flange to yield a smooth periphery upon cooling.
The disclosure relates to forming shaped thermoplastic articles having smooth peripheries. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet. Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region separated from the potentially sharp peripheral edge by a spacer, deflecting a portion of the deflectable flange, and softening at least one bent portion of the deflectable flange to yield a smooth periphery upon cooling.
The disclosure relates to containers for storing articles in a storage space within the container. The storage space is segregated from a reservoir within the interior of the container by a removable insert that prevents movement of the stored articles between the storage space and the reservoir, but does not prevent movement of, for example, gases or liquids therebetween. The insert is interposed between one or more overhangs which extend inwardly within the interior of the container and one or more shelf portions. The shelf portions maintain the patency of the reservoir, and the overhangs prevent the insert from simply falling out of the container. However, the insert can be displaced from the container by a user by grasping the container at its exterior and applying sufficient manual force to displace a flexible portion of the container body, the insert can then be removed from the interior of the container.
B65D 1/00 - Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
B65D 1/36 - Trays or like shallow containers with moulded compartments or partitions
B65D 81/00 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
B65D 81/24 - Adaptations for preventing deterioration or decay of contentsApplications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
B65D 81/26 - Adaptations for preventing deterioration or decay of contentsApplications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, fluids, e.g. exuded by contentsApplications of corrosion inhibitors or desiccators
22.
CONTAINER HAVING A RETAINED, EXTERNALLY DISPLACEABLE DRAIN INSERT
The disclosure relates to containers for storing articles in a storage space within the container. The storage space is segregated from a reservoir within the interior of the container by a removable insert that prevents movement of the stored articles between the storage space and the reservoir, but does not prevent movement of, for example, gases or liquids therebetween. The insert is interposed between one or more overhangs which extend inwardly within the interior of the container and one or more shelf portions. The shelf portions maintain the patency of the reservoir, and the overhangs prevent the insert from simply falling out of the container. However, the insert can be displaced from the container by a user by grasping the container at its exterior and applying sufficient manual force to displace a flexible portion of the container body, the insert can then be removed from the interior of the container.
B65D 81/26 - Adaptations for preventing deterioration or decay of contentsApplications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, fluids, e.g. exuded by contentsApplications of corrosion inhibitors or desiccators
23.
CONTAINER HAVING A RETAINED, EXTERNALLY DISPLACEABLE DRAIN INSERT
The disclosure relates to containers for storing articles in a storage space within the container. The storage space is segregated from a reservoir within the interior of the container by a removable insert that prevents movement of the stored articles between the storage space and the reservoir, but does not prevent movement of, for example, gases or liquids therebetween. The insert is interposed between one or more overhangs which extend inwardly within the interior of the container and one or more shelf portions. The shelf portions maintain the patency of the reservoir, and the overhangs prevent the insert from simply falling out of the container. However, the insert can be displaced from the container by a user by grasping the container at its exterior and applying sufficient manual force to displace a flexible portion of the container body, the insert can then be removed from the interior of the container.
B65D 1/00 - Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
B65D 1/36 - Trays or like shallow containers with moulded compartments or partitions
B65D 81/00 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
B65D 81/24 - Adaptations for preventing deterioration or decay of contentsApplications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
B65D 81/26 - Adaptations for preventing deterioration or decay of contentsApplications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, fluids, e.g. exuded by contentsApplications of corrosion inhibitors or desiccators
24.
APPARATUS FOR FACILITATING PEELING OF LINED CONTAINERS
The disclosure relates to an apparatus for securely (and preferably reversibly) holding a container having a concave interior portion while a liner that abuts the concave interior portion 5 is removed from the container by peeling it therefrom. The apparatus includes a container holder having one or more holding surfaces, such as the interior of an orifice that extends through it. A holding surface (e.g., an O-ring or ridge) secures the container temporarily and reversibly, and prevents the container from disengaging from the container holder during peeling of the liner. An optional deflector can deflect a tab portion of the liner to facilitate its 10 removal from the container. After the liner is removed, the remaining portion of the container can be removed from the apparatus (e.g., and recycled).
The disclosure relates to a liner for containers or packages. The liner includes several polymer layers, exhibits a barrier function (e.g., gas or moisture barrier function), and is peelably attachable to one or more container/package surfaces. When the liner lines a package or container the package or container exhibits the liner's barrier function, and the liner can be peeled from the package or container to facilitate recycling or disposal. The liner is thermoformable, and can thus be either shaped to conform to the shape of a pre-formed container or shaped simultaneously with formation of the container from a precursor material to which the liner is peelably bound, either prior to or during container formation.
B65D 41/34 - Threaded or like caps or cap-like covers
B65D 51/30 - Closures not otherwise provided for combined with auxiliary devices for non-closing purposes with auxiliary containers for additional articles or materials for desiccators
B29C 70/80 - Moulding sealing material into closure members
The disclosure relates to forming shaped thermoplastic articles having smooth edges. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet. Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region near the peripheral sharp edge, deflecting a portion of the deflectable flange by inserting it into the cavity of a frame-like upper body, optionally further deflecting the portion by inserting a ram into the cavity, and then heating and cooling the bend region to yield a smooth periphery. Alternatively, the smooth periphery can be formed by application of pressure sufficient to cause irreversible bending, with or without application of heat.
The disclosure relates to forming shaped thermoplastic articles having smooth edges. Many thermoplastic articles have sharp edges formed upon molding or cutting the article from a feedstock sheet. Such sharp edges can damage thin plastic films or flesh which they contact, and smoothing the edges is desirable. Described herein are methods of forming a smooth periphery for such sharp-edged articles by rolling over the sharp edge. The smoothing operation is performed by forming a deflectable flange including a bend region near the peripheral sharp edge, deflecting a portion of the deflectable flange by inserting it into the cavity of a frame-like upper body, optionally further deflecting the portion by inserting a ram into the cavity, and then heating and cooling the bend region to yield a smooth periphery. Alternatively, the smooth periphery can be formed by application of pressure sufficient to cause irreversible bending, with or without application of heat.
The disclosure relates to containers and other shaped articles (e.g., trays and dishes) for containing articles such as food products (e.g., cuts of meat and poultry or liquid-sensitive electronic parts) in shaped articles such as. In one aspect, the container has a reservoir portion into which liquid can be sequestered. In another aspect, the container includes a thermoformable substrate, a liner, and a lidding material, the lidding and the liner defining a compartment for containing articles. The compartment can be detached from the substrate by detaching the liner from the substrate without necessarily rupturing the compartment. A substantial portion of the containers described herein can be recycled by separating the liner and/or lidding from the substrate. The disclosure also relates to methods of making thermoformed articles having multiple layers that does not rely on use of a coextruded or other composite thermoplastic-containing substrate.
B65D 81/26 - Adaptations for preventing deterioration or decay of contentsApplications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, fluids, e.g. exuded by contentsApplications of corrosion inhibitors or desiccators
B65D 51/28 - Closures not otherwise provided for combined with auxiliary devices for non-closing purposes with auxiliary containers for additional articles or materials
B65D 77/30 - Opening or contents-removing devices added or incorporated during filling or closing of containers
B65D 1/26 - Thin-walled containers, e.g. formed by deep-drawing operations
The disclosure relates to a laminated, thermoformable barrier film useful as a peelable surface liner, such as in containers and other shaped articles. The laminated film includes at least two layers, including a distal layer and a medial layer, The medial layer includes an odor-resistant polymer barrier layer that inhibits passage of gases and odors therethrough. The distal layer includes a polymer layer that inhibits permeation of a liquid through the distal layer from a contact face thereof to the barrier layer. Optionally, the distal layer can include a scratch resistant layer. The laminated film can also include a proximal layer that includes a layer of a pliable polymer. The laminated film can he included as a surface liner, or stack of surface liners, on a thermoformed article or on a sheet that can be thermoformed. The laminated sheets have multiple uses, including as liners for food sendee containers. In such containers, the barrier layer of the l aminated sheets can inhibit penetration of the liner by odors or tastes from food items contained therein and can also prevent liquid satura tion of the barrier layer of the sheets, which could otherwise limit the odor-resistant properties of the sheets.
B32B 27/06 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
The disclosure relates to containers and other shaped articles that have a relatively thick substrate layer and one or more relatively thin liner sheets peelably adhered thereto. Animal litter can be placed atop the liner sheets, preferably in a concave portion to contain the litter. The liner sheets have perforations extending therethrough that permit the passage of non-soiled litter, but do not permit the passage of at least one of animal feces and soiled animal litter, such as clumps of litter and urine. After an animal has deposited waste on or in the litter, the liner sheet can be peeled from the container and waste unable to pass through the perforations can be collected.
B65D 21/032 - Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together for stacking containers one upon another in the upright or upside down position, e.g. with vertically projecting elements or recesses
B29C 51/10 - Forming by pressure difference, e.g. vacuum
B29C 51/14 - Shaping by thermoforming, e.g. shaping sheets in matched moulds or by deep-drawingApparatus therefor using multilayered preforms or sheets
B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
B32B 15/08 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
A multilayer stack of polymeric sheets can be used in thermoforming processes to make objects wherein each sheet has substantially the same shape. The stack includes at least one sheet of a thermoformable polymer, and can include many such sheets. A barrier layer is interposed between at least an overlapping portion at least two of the polymeric sheets in order to prevent fusion of the sheets in the overlapping portion during the thermoforming process. The barrier layer can include an adhesive that adheres the sheets in the overlapping portion. In formed articles including such an adhesive, the sheets can be manually peeled from one another if a suitable adhesive is selected. The stack (and object formed using the stack) can include polymeric sheets that are not thermoformable, but are adhered to the surface of a thermoformable sheet.
B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)
B29C 51/02 - Combined thermoforming and manufacture of the preform
B29C 51/14 - Shaping by thermoforming, e.g. shaping sheets in matched moulds or by deep-drawingApparatus therefor using multilayered preforms or sheets
B29K 23/00 - Use of polyalkenes as moulding material
B29K 67/00 - Use of polyesters as moulding material
A multilayer stack of polymeric sheets can be used in thermo forming processes to make objects wherein each sheet has substantially the same shape. The stack includes at least one sheet of a thermoformable polymer, and can include many such sheets. A barrier layer is interposed between at least an overlapping portion at least two of the polymeric sheets in order to prevent fusion of the sheets in the overlapping portion during the thermo forming process. The barrier layer can include an adhesive that adheres the sheets in the overlapping portion. In formed articles including such an adhesive, the sheets can be manually peeled from one another if a suitable adhesive is selected. The stack (and object formed using the stack) can include polymeric sheets that are not thermoformable, but are adhered to the surface of a thermoformable sheet. The sheets and objects can include multiple separable and/or peelable sheets. The stack can be used, for example, to make peelable, re-usable food service trays. In such trays, a rigid base has multiple peelable sheets adhered to at least one surface thereof, the sheets being peelable from the surface to reveal a sanitary surface amenable to food contact.
A multilayer stack of polymeric sheets can be used in thermoforming processes to make objects wherein each sheet has substantially the same shape, The stack includes at least one sheet of a thermoformable polymer, arid can include many such sheets. A barrier layer is interposed between at least an overlapping portion at least two of the polymeric sheets in order to prevent fusion of the sheets in the overlapping portion during the thermoforming process. The barrier layer can include an adhesive that adheres the sheets in the overlapping portion. In formed articles including such an adhesive, the sheets can be manually peeled from one another if a suitable adhesive is selected. The stack (and object formed using the stack) can include polymeric sheets that are not thermoformable, but are adhered to the surface of a thermoformabie sheet. The sheets and objects can include multiple separable and/or peclable sheets. The stack is amenable for simultaneous manufacture of multiple thermoformed items having substantially identical shapes, The stack is also amenable for manufacture of thermoformed items having multiple peelable layers, including items (e.g., paint trays) in which is desirable to remove a soiled surface rather than cleaning that surface.
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
B32B 15/08 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
B32B 37/12 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
A preformed paint tray with peelable liners is made from a planar tray substrate with upper and lower surfaces and a plurality of stacked liner sheets with peelable adhesive on one surface by positioning the liner sheets adjacent a surface of the substrate, and simultaneously thermoforming the substrate and sheets together to form a substrate having a shaped interior, with the sheets conforming to the shaped interior of the substrate. The sheets are maintained in the thermoformed shape by their adherence to the other sheets and the substrate. If desired, the sheets can include tear tabs to facilitate separation of the top sheet from the other sheets. The tray can be cleaned of residual paint after use by simply peeling away the upper liner sheet.
