US3602497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet registering and feeding mechanisms
Assignee: HTB Ltd
•
Filing: 1969-05-23
•
Granted: 1971-08-31
•
Expires: 1989-05-23
Abstract
Abstract A mechanism for registering sheets of paper and feeding them individually to a machine which operates on single sheets comprises a hook which contacts the leading edge of a sheet advancing over a table, slows down and stops at a registering position to stop and register the sheet and then advances to clear the sheet in combination with feed rollers which grip the sheet after registration and feed it to the machine.
Inventors
- 👤 Charles Frederick Fawdry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:53
CPC Classifications
B; B65; B65H; B65H9/00; B65H9/10; B65H9/103; B65H9/106
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
311 words
A sheet registering and feeding mechanism comprising; a feed table for receiving a succession of sheets over the table, at least one feed roller below the table for engaging the underside of each leading sheet in the succession in turn, means for driving the feed roller intermittently, at least one nip roller mounted above the feed roller and movable between a disengaged position, in which it is spaced from the feed roller, and an engaged position, in which it presses the sheets against the feed roller, at least one combined slow down abutment and front lay means comprising a member arranged to be engaged by the leading edge of each sheet in turn as the sheet is fed over the table, means for moving said member in a path in which it is caused to travel in a sheet-feeding direction to a lay position beyond said at least one feed roller, at which position it is caused to stop so as to serve as a register for the leading sheet edge, from where it is caused to move further in the sheetfeeding direction to clear the sheet, after which it is returned at a lower level and then raised to receive the next sheet, and means for timing said sheet registering and feeding mechanism in a cycle of operation in which (a) each sheet in turn is engaged by said member as it approaches the front lay position, with the member moving in a sheet-feeding direction and with said nip and feed rollers being separated to allow the sheet to pass between, (b) said member is stopped to register the sheet, (c) said nip and feed rollers are brought together to grip the sheet while the rollers are held stationary, (d) said member is moved forwardly to clear the sheet and (e) the feed roller is rotated to feed the sheet.
Claim 2
Dependent Claim
311 words
A sheet registering and feeding mechanism comprising; a feed table for receiving a succession of sheets over the table, at least one feed roller below the table for engaging the underside of each leading sheet in the succession in turn, means for driving the feed roller intermittently, at least one nip roller mounted above the feed roller and movable between a disengaged position, in which it is spaced from the feed roller, and an engaged position, in which it presses the sheets against the feed roller, at least one combined slow down abutment and front lay means comprising a member arranged to be engaged by the leading edge of each sheet in turn as the sheet is fed over the table, means for moving said member in a path in which it is caused to travel in a sheet-feeding direction to a lay position beyond said at least one feed roller, at which position it is caused to stop so as to serve as a register for the leading sheet edge, from where it is caused to move further in the sheetfeeding direction to clear the sheet, after which it is returned at a lower level and then raised to receive the next sheet, and means for timing said sheet registering and feeding mechanism in a cycle of operation in which (a) each sheet in turn is engaged by said member as it approaches the front lay position, with the member moving in a sheet-feeding direction and with said nip and feed rollers being separated to allow the sheet to pass between, (b) said member is stopped to register the sheet, (c) said nip and feed rollers are brought together to grip the sheet while the rollers are held stationary, (d) said member is moved forwardly to clear the sheet and (e) the feed roller is rotated to feed the sheet.
Claim 3
Dependent Claim
35 words
Mechanism as claimed in claim 1 in combination with the sheet feeder for separating sheets from a pile or stack and forwarding the sheets as a continuous stream of partly underlapping sheets over the table.
Claim 4
Dependent Claim
29 words
Mechanism as claimed in claim 1 in combination with a machine operating on a succession of individual sheets and to which the sheets are fed by the feed roller.
Claim 5
Dependent Claim
30 words
Mechanism as claimed in claim 9 and embodying a side lay mechanism operable to effect side registration of the sheets before they are gripped by the nip and feed rollers.
Claim 6
Dependent Claim
23 words
Mechanism as claimed in claim 9 and embodying at least one vortex suction device on the feed table for holding the sheets down.
Claim 7
Dependent Claim
13 words
Mechanism as claimed in claim 9 and embodying a two-sheet caliper or detector.
Claim 8
Dependent Claim
30 words
The mechanism of claim 1 in which the combined slowdown abutment and front lay means comprises a hooklike member to receive the edge portion of a sheet within the hook.
Claim 9
Dependent Claim
98 words
Mechanism for registering each sheet in turn of a succession of advancing sheets and for feeding the registered sheet characterized by at least one combined slowdown abutment and front lay comprising a member arranged (a) to be engaged by the leading edge of the sheet, (b) to move in the sheet-advancing direction while slowing down the sheet to a lay position at which it stops and serves as the register for a leading sheet edge and thereafter (c) to move out of the path of the sheet, in combination with means for gripping and forwarding the registered sheet.
Claim 10
Dependent Claim
98 words
Mechanism for registering each sheet in turn of a succession of advancing sheets and for feeding the registered sheet characterized by at least one combined slowdown abutment and front lay comprising a member arranged (a) to be engaged by the leading edge of the sheet, (b) to move in the sheet-advancing direction while slowing down the sheet to a lay position at which it stops and serves as the register for a leading sheet edge and thereafter (c) to move out of the path of the sheet, in combination with means for gripping and forwarding the registered sheet.
Claim 11
Dependent Claim
16 words
Mechanism as claimed in claim 8 in which the gripping and forwarding means comprises feed rollers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |