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US 4,919,047 AGranted
Multicolor printing press
AssigneeToray Industries, Inc.
InventorsYoshinori Inouye, Minoru Ueda, Kosuke Yotsuzuka
Life of this patent
Estimating the term…
Abstract
A multicolor printing press incorporating a plurality of plate cylinders (3, 4) capable of winding dampening-waterless plates (50) onto themselves at the predetermined positions of the printing press body (1). The multicolor printing press is provided with a plurality of inking devices (7, 8) and plate feeding/discharging devices (5, 6) which are commonly made available for these plate cylinders (3, 4) so that these devices can individually be mounted onto and removed from the positions of printing press body (1) opposite the plate cylinders (3, 4), thus allowing the printing plate (50) to be automatically fed to and discharged from the plate cylinders (3, 4) and the printing operation to be quickly and easily changed as required.
Claims19
A multicolor printing press executing printing operations with waterless printing plates, said multicolor printing press comprising:
- a printing press body;
- a plurality of plate cylinders being set to predetermined positions of said printing press body;
- a plurality of inking devices each commonly being compatible with each plate cylinder and installed to said printing press body so that each of said inking devices can individually and freely be mounted onto and removed from said printing press body;
- and
- a plurality of plate feeding and discharging devices each commonly being compatible with each of said plate cylinders and means for installing said plate feeding and discharging devices to said printing press body so that each said plate feeding and discharging device can individually and freely be mounted onto and removed from said printing press body
- wherein each said inking device includes:
- a frame;
- a form roller mounted on said frame;
- an ink distributing roller mounted to said frame;
- and
- a roller operating mechanism mounted to said frame for pressing said ink distributing roller against said form roller;
- driving means being provided at said printing press body for driving said roller operating mechanism;
- said ink distributing roller being pressed against said form roller by engaging said driving means with said roller operating mechanism in conjunction with mounting said inking device onto said printing press body, wherein
- said roller operating mechanism includes:
- a driving lever connected pivotally to said frame of said inking device;
- and
- a linkage connected between said driving lever and a roller shaft of said ink distributing roller enabling said ink distributing roller to be pressed against and released from said form roller in conjunction with movement of said driving lever;
- said driving means comprising a spring mounted to said printing press body,
- said spring causing said driving lever to pivot from a raised position by mounting said inking device onto said printing press body.
16 more elements
A multicolor printing press executing printing operations with waterless printing plates, said multicolor printing press comprising:
- a printing press body;
- a plurality of plate cylinders being set to predetermined positions of said printing press body;
- a plurality of inking devices each commonly being compatible with each plate cylinder and installed to said printing press body so that each of said inking devices can individually and freely be mounted onto and removed from said printing press body;
- and
- a plurality of plate feeding and discharging devices each commonly being compatible with each of said plate cylinders and installed to said printing press body so that each of said plate feeding and discharging devices can individually and freely be mounted onto and removed from said printing press body, wherein
- each said inking device includes
- a frame;
- and
- a form roller having a roller shaft and mounted to said frame by said roller shaft;
- said multicolor printing press further comprising:
- a blanket cylinder mounted to said printing press body;
- means for moving said each plate cylinder so that said each plate cylinder can come into and out of contact with said blanket cylinder;
- means being provided to said printing press body for holding a front end portion of said frame of each said inking device so that the frame can pivot about its front end portion;
- driving means being provided to said printing press body for holding a rear end portion of said frame of each said inking device to move the rear end portion of said frame so that each said form roller can come into and out of contact with each said plate cylinder;
- shaft-to-shaft distance regulating members being held at one end thereof by rotational shafts of said plate cylinders respectively, each said shaft-to-shaft distance regulating member including at an other end portion thereof a roller-shaft retention part for connection to the roller shaft of each said form roller;
- and
- means being provided on said printing press body for holding each shaft-to-shaft distance regulating member so that each said roller-shaft retention part faces the roller shaft of each said form roller;
- each said shaft-to-shaft distance regulating member connected to the roller shaft of each said form roller by each said roller-shaft retention part to provide contact-pressure between each said form roller and each said plate cylinder when said driving means causes each said form roller to come into contact with each said plate cylinder to thereby maintain a distance between the rotational shaft of each said plate cylinder and the roller-shaft of each said form roller at a predetermined value.
15 more elements
A method of controlling printing ink concentration for a multicolor printing press including a printing press body;
- a plurality of plate cylinders mounted to said printing press body;
- a plurality of inking devices respectively associated with said plate cylinders and mounted to said printing press body;
- a plurality of plate feeding and discharging devices respectively associated with said plate cylinders and mounted to said printing press body;
- a blanket cylinder mounted to said printing press body;
- an impression cylinder mounted to said printing press body;
- means for driving said impression cylinder, said blanket cylinder, each said plate cylinder and each said form roller;
- means for moving each said inking device being mounted to said printing press body so that each form roller can come into and out of contact with each said plate cylinder;
- means for moving each plate cylinder so that each plate cylinder can come into and out of contact with said blanket cylinder;
- means for moving said impression cylinder so that said impression cylinder can come into and out of contact with said blanket cylinder;
- a carrier means for carrying a continuous paper inserted between said impression cylinder and said blanket cylinder, and input means for inputting information to initiate a printing operation;
- said control method comprising:
- a first step of driving said impression cylinder, said blanket cylinder, each said plate cylinder and each said form roller apart from each other in response to a start command from said input means;
- a second step of feeding a greater amount of ink than a standard amount of each said plate cylinder from each said form roller by causing each said plate cylinder to rotate in contact with said each form roller in response to a printing start-up command from said input means;
- a third step of transferring a greater amount of ink than a standard amount to each said blanket cylinder from each said plate cylinder by causing each said plate cylinder to rotate in contact with said blanket cylinder after completing said second step;
- a fourth step of causing each said form roller to depart from each said plate cylinder while causing said impression cylinder to come into contact with said blanket cylinder after completing said third step;
- a fifth step of printing one page on said continuous paper by causing said blanket cylinder and each said plate cylinder to rotate respectively while said continuous paper is carried by said carrier means after completing said fourth step;
- and
- a sixth step of causing each said form roller to come into contact with each said plate cylinder after completing said fifth step.
15 more elements
A multicolor printing press executing printing operations with waterless printing plates, said multicolor printing press comprising:
- a printing press body;
- a plurality of plate cylinders being set to predetermined positions of said printing press body;
- a plurality of inking devices each commonly being compatible with each plate cylinder and means for detachably installing to said printing press body each of said inking devices such that said inking devices can individual and freely be mounted into an operative mounting position and completely removed from said printing press body;
- and
- a plurality of plate feeding and discharging devices each having means commonly being compatible with each of said plate cylinders and installed to said printing press body so that each of said plate feeding and discharging devices can individually and freely be mounted onto and removed from said printing press body wherein
- each said inking device includes:
- a frame;
- a form roller mounted on said frame;
- an ink distributing roller mounted to said frame;
- and
- a roller operating mechanism mounted to said frame for pressing said ink distributing roller against said form roller;
- driving means mounted to said printing press body for driving said roller operating mechanism upon contact with said roller operating mechanism when said inking device is in its operative mounted position on the printing press body;
- said roller operating mechanism including means for pressing said ink distributing roller against said form roller upon engagement of said driving means with said roller operating mechanism in conjunction with mounting said inking device onto said printing press body.
10 more elements
Dependencies are inferred from the claim text.