US3853315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet feeder for printing presses
Assignee: Individual
•
Filing: 1972-05-04
•
Granted: 1974-12-10
•
Expires: 1992-05-04
Abstract
Abstract A sheet transfer conveyor for a sheet-fed printing press comprising spaced gripper bars carried by endless flexible tapes. Movement of the tapes and grippers carried thereby is constantly synchronized with movement of printing surfaces to assure that register between sheets and printing cylinders is never lost from the time a sheet is fed to the press until it has been printed and released at a delivery station. Tape guide wheels are rotatably secured adjacent opposite ends of the printing press and have slotted blocks spaced about the periphery thereof engageable with surfaces on the gripper bars to maintain the gripper bars and tape wheels in synchronized relation.
Inventors
- 👤 H Dahlgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:16
CPC Classifications
B; B41; B41F; B41F13/00; B41F13/08; B41F13/24; B41F13/34; B41F13/36; B41F21/00; B41F21/08; B41P; B41P2213/00; B41P2213/70; B41P2213/73; B41P2213/734
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
244 words
A device for moving a sheet of paper in a printing press comprising, spaced aligned sheet transfer carrier guide members rotatably journaled adjacent each end of the press; continuous flexible sheet transfer carriers extending about the carrier guide members at each side of the press and being rotatable with the guide members; a plurality of slotted blocks mounted in spaced apart peripheral relationship on the guide members to cause the carriers to rotate with the guide members; means to drive the carriers; a plurality of spaced gripper bars; means to secure opposite ends of said bars to said carriers; surfaces on each of said gripper bars engageable with slots in said blocks; at least one gripper member mounted on each gripper bar for gripping the edge of a sheet; means to actuate the gripper members to engage the edge of the sheet at one end of the press; means to actuate the gripper members to release the sheet at the other end of the press; and gripper bar guide means secured to opposite sides of the press to guidably support the gripper bars, said gripper bar guide means having guide surfaces to direct the gripper bars from one end of the press to the other along a path having no abrupt changes in direction whereby dynamic forces transferred by a gripper bar to the carriers as a gripper bar is moved longitudinally from one end of the press to the other is substantially constant.
Claim 2
Independent Claim
244 words
A device for moving a sheet of paper in a printing press comprising, spaced aligned sheet transfer carrier guide members rotatably journaled adjacent each end of the press; continuous flexible sheet transfer carriers extending about the carrier guide members at each side of the press and being rotatable with the guide members; a plurality of slotted blocks mounted in spaced apart peripheral relationship on the guide members to cause the carriers to rotate with the guide members; means to drive the carriers; a plurality of spaced gripper bars; means to secure opposite ends of said bars to said carriers; surfaces on each of said gripper bars engageable with slots in said blocks; at least one gripper member mounted on each gripper bar for gripping the edge of a sheet; means to actuate the gripper members to engage the edge of the sheet at one end of the press; means to actuate the gripper members to release the sheet at the other end of the press; and gripper bar guide means secured to opposite sides of the press to guidably support the gripper bars, said gripper bar guide means having guide surfaces to direct the gripper bars from one end of the press to the other along a path having no abrupt changes in direction whereby dynamic forces transferred by a gripper bar to the carriers as a gripper bar is moved longitudinally from one end of the press to the other is substantially constant.
Claim 3
Dependent Claim
35 words
The combination called for in claim 1 wherein each carrier guide member comprises a tape wheel, with the addition of means for adjusting the peripheral position of each slotted block relative to the tape wheel.
References Cited (Backward Citations)
US544685A
Cited
US648865A
Cited
US1046095A
Cited
US1164802A
Cited
US1894829A
Cited
US2138405A
Cited
US3179404A
Cited
US3664261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |