Abrégé

A water boat device is provided with: a water boat 24 for storing dampening water A20; a water source roller 25 that rotates in contact with the dampening water A20 stored in the water boat 24; and a thermoelectric convertor 500 that is installed inside the water source roller 25 and controls the temperature of the water source roller 25. The water source roller 25 has a cylindrical shape, and the water boat 24 has a recessed part 24a curved along the outside surface of the water source roller 25. The dampening water A20 is stored in the recessed part 24a. The water source roller 25 is fitted into the recessed part 24a in a state of being separated from the inside surface of the recessed part 24a.

Classes IPC  ?

• B41F 7/24 - Dispositifs de mouillage
• B41F 7/02 - Rotatives lithographiques pour l'impression offset
• B41F 7/06 - Rotatives lithographiques pour l'impression offset utilisant des groupes imprimants comprenant un cylindre de cliché, un cylindre de report et un cylindre d'impression, p. ex. pour impression sur bandes pour impression sur feuilles
• B41F 7/32 - Tuyauteries, réservoirs ou dispositifs similaires d'alimentation en liquides
• B41F 33/10 - Dispositifs de déclenchement ou d'arrêt pour démarrer ou arrêter le mouillage ou l'encrage

Abrégé

The present invention provides a metal plating solution comprising chromium sulfate and formic acid, the Cr3+ ion concentration being 0.1 mol/L to 1 mol/L and the formic acid concentration being 0.05 mol/L to 0.2 mol/L.

Classes IPC  ?

• C25D 3/06 - Dépôt électrochimiqueBains utilisés à partir de solutions de chrome à partir des solutions de chrome trivalent

Abrégé

This method for producing a plated roll comprises: a smoothing step of smoothing the surface of a roll base material composed of a cylindrical carbon fiber reinforced plastic; a base plating step of performing metal plating on the roll base material having been subjected to the smoothing step; and a surface plating step of performing trivalent chrome plating on the roll base material having been subjected to the base plating step in a plating solution. The surface plating step comprises a hydrogen removal step of removing hydrogen gas generated on a plated surface being formed.

Classes IPC  ?

• C25D 5/56 - Dépôt électrochimique sur des surfaces non métalliques de matières plastiques
• C25D 5/14 - Dépôt de plusieurs couches du même métal ou de métaux différents au moins une couche étant du nickel ou du chrome plusieurs couches étant du nickel ou du chrome, p. ex. couches doubles ou triples
• C25D 7/04 - TubesAnneauxCorps creux
• C25D 21/04 - Enlèvement des gaz ou des vapeurs
• C25D 21/10 - Agitation des électrolytesDéplacement des claies

Abrégé

[Problem] To simultaneously achieve "lengthening of roll life," "facilitation of pressure adjustment," "stabilization of movement speed," "increased compactness", etc. with a simple configuration by making the diameter of forward pistons to be larger than return pistons, supplying a fluid to forward cylinders and return cylinders with forward flow paths and forward flow paths that branch at branching paths, and providing a valve element capable of discharging the fluid in the forward flow paths. [Solution] A divided roll comprises multiple roughly cylindrical small roll elements (2) and a support (3) onto the outside of which the multiple small roll elements (2) are fitted so as to rotate freely. In the support (3), forward cylinders (4) and return cylinders (5) are provided at roughly face-on positions to reciprocate each of the small roll elements (2) in a specified movement direction (X). Forward pistons (6), which slide in continuous contact inside the forward cylinders (4), have a cross-sectional area (s) that is larger than return pistons (7), which slide in continuous contact inside the return cylinders (5). A fluid from outside of the support (3) respectively flows into or flows out of the interior of the forward cylinders (4) and the return cylinders (5) through forward flow paths (4a) and return flow paths (5a) that branch at branching paths (8). Valve elements (9) that are capable of discharging the fluid are provided in the forward flow paths (4a).

Classes IPC  ?

• B41F 31/14 - Utilisation de cylindres de va-et-vient ou autres cylindres preneurs
• B41F 31/26 - Structure des cylindres d'encrage
• B41F 33/00 - Dispositifs indicateurs, dispositifs de comptage, d'avertissement, de commande ou de sécurité