Patent US3797929A successfully refreshed from Google Patents.
US3797929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gripper-bar bumper pads
Assignee: Unisys Corp
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Filing: 1973-01-29
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Granted: 1974-03-19
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Expires: 1993-01-29
Abstract
Abstract An endless-chain transport system for a photocopy machine is described for gripping copy sheets at a paper-feed station, transporting the copy sheets past a photoconductive drum while holding surfaces of the copy sheets in close proximity to the drum, and transporting the copy sheets to a copy-sheet-delivery station. The transport system comprises gripper bars mounted on transport chains having gripper jaws which are opened and closed by cams to grip and release the copy sheets. Gripper-bar bumper pads are mounted on the gripper bars to hold the gripper bars away from the photoconductive drum.
Inventors
- 👤 G Deacon
- 👤 J Toto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:16
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6529
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
125 words
In a copying machine of the type comprising a photoconductive drum; a gripper-bar means for gripping copy sheets and transporting said copy sheetS past said photoconductive drum while holding surfaces of said copy sheets in close proximity to said drum; wherein said gripper-bar means includes a bumper pad mounted on a side of said gripper-bar means which passes closest to size drum, said bumper pad being of such a siz as to come into contact with said drum as said gripper-bar means passes said drum and to prevent contact between other portions of said gripper bar means and said drum, said bumper pad being of a material which is soft relative to said other portions of said gripper bar and non-abrasive to said photoconductive drum.
Claim 2
Dependent Claim
125 words
In a copying machine of the type comprising a photoconductive drum; a gripper-bar means for gripping copy sheets and transporting said copy sheetS past said photoconductive drum while holding surfaces of said copy sheets in close proximity to said drum; wherein said gripper-bar means includes a bumper pad mounted on a side of said gripper-bar means which passes closest to size drum, said bumper pad being of such a siz as to come into contact with said drum as said gripper-bar means passes said drum and to prevent contact between other portions of said gripper bar means and said drum, said bumper pad being of a material which is soft relative to said other portions of said gripper bar and non-abrasive to said photoconductive drum.
Claim 3
Dependent Claim
20 words
In a copying machine as claimed in claim 1, an endless-belt transport system on which said gripper-bar means is mounted.
Claim 4
Dependent Claim
109 words
In a copying machine as claimed in claim 2 wherein; said endless-belt transport system comprises two chains between which said gripper-bar means is mounted; stationary cams; and said gripper-bar means comprises: an elongated frame which defines a stationary jaw; a plurality of movable jaws mounted on said frame, said movable jaws being biased toward said stationary jaw but said movable jaws having cam followers integral therewith which strike said stationary cams as said gripper bar means passes said stationary cams thereby separating said movable jaws from said stationary jaw; and at least two of said bumper pads, with one bumper pad being mounted at each end of said frame.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |