Device for pressing on a flexible printing form when it...

Device for pressing on a flexible printing form when it is being pulled onto a form cylinder of an offset printing press

Device for pressing on a flexible printing form when it is being pulled onto a form cylinder of an offset printing press

Patent Agent: Lerner Greenberg Stemer LLP - Hollywood, FL, US
Patent Inventor: Alexander Knabe
Applicaton #: 20070044671
Class: 101246000 (USPTO)
Related Patents: Printing, Rolling Contact Machines, Rotary, Gripper Cylinder
03/01/07
A device for pressing on a flexible printing form when it is being pulled onto a form cylinder of an offset printing press. The device makes it possible to use an offset cylinder which is not in phase. The device for pressing on a flexible printing form when it is being pulled onto a form cylinder of an offset printing press, has a switching-on or switching-off apparatus of an offset cylinder with respect to the axially parallel form cylinder and an axially parallel impression cylinder, the offset cylinder having a channel, above which a cover is arranged, and the impression cylinder having a gripper system for sheets. The gripper system protrudes beyond the circumferential contour of the impression cylinder and dips into the channel of the offset cylinder during printing. The surface of the cover has support surfaces for the printing form which supplement the contour of the offset cylinder, and the cover has cutouts or depressions which lie deeper and in the circumferential direction to allow the gripper system to dip into.

SUMMARY OF THE INVENTION
[0006] It is accordingly an object of the invention to provide a device for pressing on a flexible printing form when it is being pulled onto a form cylinder of an offset printing press, which overcomes the above-mentioned disadvantages of the heretofore-known devices and methods of this general type and which renders it possible to use an offset cylinder which is not in phase.
[0007] With the foregoing and other objects in view there is provided, in accordance with the invention, a device for pressing on a flexible printing form when it is being pulled onto a form cylinder of an offset printing press. The device comprises:
a switching-on or switching-off apparatus of the offset cylinder with respect to an axially parallel form cylinder and an axially impression cylinder;
the offset cylinder having a channel formed therein, and a cover disposed above the channel;
the impression cylinder having a gripper system for sheets, the gripper system protruding beyond a circumferential contour of the impression cylinder and dipping into the channel formed in the offset cylinder during printing;
[0008] the cover having a surface formed with support surfaces for supporting the printing form and supplementing a contour of the offset cylinder, and the cover having depressions formed therein lying deeper than the support surfaces and extending in the circumferential direction, enabling the gripper system to dip into the depressions.
[0009] In other words, the objects of the invention are achieved in that a cover of a channel of the offset cylinder is configured as a support for a printing form when it is being pulled onto a form cylinder. The support surfaces of the cover lie at the radial height of the effective diameter of the elastic cover of the offset cylinder. The support surfaces bridge the channel as far as possible. The cover has cutouts which lie deeper in the circumferential direction, into which grippers of a gripper system of an adjacent impression cylinder can dip. If the cover is of symmetrical design, an inverted installation into the offset cylinder is possible.
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Goldensign International Technology Co., Ltd.
Contact Person: Harry Zhang
Address: A-2, 3/F, 1276 Jinqiao Road, Pudong District, Shanghai City. China
Zip: 200136
Telephone: 86-21-50717226
Fax: 86-21-50710332
Website: http://www.goldensign.net
http://www.sign-machine.com
http://goldensign.en.alibaba.com
Company Name: Goldensign International Technology Co., Ltd.
Country/Territory: China (Mainland)
Legal Form: Other Limited Liability Companies
Registered Address: No. 6, Room 102, No. 1256, Lane 288, East Kangqiao Road, Kangqiao Town, Nanhui, Shanghai, China (Mainland) Zip: 200136
Products/Services We Offer: Sign products such as acrylic sheets, PVC foam sheets, double-color sheets, frontlit, backlit, one way visions, inkjet printers, laser engraving machines, CNC routers and cutting plotters
Business Type: Manufacturer
OEM Service: Yes
Buyer or Supplier: Supplier
Geographic Markets: Worldwide
No. of Employees: 51 - 100 People
No. of R&D Staff: 5 - 10 People
Estimated Annual Sales (USD): US$5 Million - US$10 Million
Quality Control: In House
Year Established: 2004-10-20
Legal Representative/CEO: Mr. Hairu Zhang
About Us

As a professional company of advertising products, Goldensign International Technology Co., Ltd. (Goldensign) manufactures many competitive products successfully in China. Now, we export goods to 55 overseas countries and regions. Goldensign has excellent technical development team, senior sales engineers, super service system and wide product range.
Our printing materials include frontlit, backlit, meshes, blockouts,
self-adhesive vinyl, one-way vision / perforated vinyl, textiles, clear adhesive vinyl and tarpaulins.
Our engraving materials are PVC foam sheets, rigid PVC sheets, acrylic sheets, double-color sheets and aluminum composite panels.
Our sign machines include wide format digital inkjet printers, CNC routers, laser engraving machines, cutting plotters, plastic welders and flame polishers. They are widely applied for traffic boards, vehicle graphics, street advertising and market advertising.
Goldensign offers one stop solution, lower cost, super quality, and satisfactory service that can ensure your position in the market competition. Today, international cooperation develops further. We hope to establish great business relationships with all clients at home or abroad to develop markets and to make a promising future.