US4474368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillating finger sheet item detac apparatus
Assignee: Unisys Corp
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Filing: 1982-12-17
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Granted: 1984-10-02
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Expires: 2002-12-17
Abstract
Abstract Continuous sheet item delaminating apparatus for electrographic drum printing/copying devices including a relatively flat horizontal coupler member having an upstanding vertical attachment portion and a u-shaped portion normal thereto. A plurality of curved, knife edged item picker fingers are mounted between the parallel legs of the u-shaped portion. The vertical attachment portion is pivotally secured to a rotatable crank rotated by a pulley driven from an associated synchronizer. A rocker-idler arm is fixedly pivoted at one end and is coupled at the opposite end to the coupler member such that rotation of the crank causes the picker fingers to follow a four bar coupler curve toward and away from the sheet item effective to lift the forward edge of the item off the drum and permit the item to fall by gravity onto a safe area for further handling.
Inventors
- 👤 Emmett B. Peter, III
- 👤 Wilson P. Rayfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:13
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6532; B; B65; B65H; B65H29/00; B65H29/54; B65H29/56; Y; Y10; Y10S; Y10S271/00; Y10S271/90
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
150 words
Oscilating finger, continuous motion detac apparatus for delaminating and lifting a sheet item from a printer/copier drum comprising; coupler means, a plurality of delaminating picker fingers, carrier means for said picker fingers, said carrier means being operably mounted to said coupler means for conjoint movement therewith, rocker means one end of which is pivoted to a said coupler means, and crank means coupled to synchronizing means and to said coupler means for continuously, cyclically moving said coupler means along a coupler curve for moving said detac fingers into and out of contact with an individual sheet item carried by said drum, effective to lift said item from said drum at the forward speed of said item and thereafter to move completely out of the path of said sheet item at an increased speed so as to permit said item to fall by gravity onto a safe area for further handling.
Claim 2
Dependent Claim
150 words
Oscilating finger, continuous motion detac apparatus for delaminating and lifting a sheet item from a printer/copier drum comprising; coupler means, a plurality of delaminating picker fingers, carrier means for said picker fingers, said carrier means being operably mounted to said coupler means for conjoint movement therewith, rocker means one end of which is pivoted to a said coupler means, and crank means coupled to synchronizing means and to said coupler means for continuously, cyclically moving said coupler means along a coupler curve for moving said detac fingers into and out of contact with an individual sheet item carried by said drum, effective to lift said item from said drum at the forward speed of said item and thereafter to move completely out of the path of said sheet item at an increased speed so as to permit said item to fall by gravity onto a safe area for further handling.
Claim 3
Dependent Claim
30 words
The invention in accordance with claim 1 wherein said coupler means comprises an irregularly shaped rigid member having a u-shaped attachment portion and pivot mounting means for said rocker member.
Claim 4
Dependent Claim
34 words
The invention in accordance with claim 2 wherein said coupler means is a rigid casting and further includes an integral upstanding portion orthogonal to said u-shaped portion for pivotal attachment to said crank means.
Claim 5
Dependent Claim
35 words
The invention in accordance with claim 1 wherein said picker fingers comprise rigid, substantially u-shaped elements provided with angled knife edge portions extending away from the said carrier means for sliding contact with said items.
Claim 6
Dependent Claim
61 words
The invention in accordance with claim 1 wherein said carrier means further includes a rigid horizontal member disposed between the legs of said u-shaped attachment portion and an adjusting tang normal to said rigid member for altering the contact relationship between said picker fingers and said sheet item whereby only the leading edge of said item is contacted by said fingers.
Claim 7
Dependent Claim
48 words
The invention in accordance with claim 4 wherein said carrier means further includes oppositely disposed parallel, flat, resilient members, with said u-shaped finger elements disposed between confronting pairs of resilient members and with the opposite ends of said resilient members being rigidly secured between confronting vertical stop members.
Claim 8
Dependent Claim
24 words
The invention in accordance with claim 6 wherein said carrier means is pivotally mounted between the parallel leg portions of said u-shaped attachment portion.
Claim 9
Dependent Claim
17 words
The invention in accordance with claim 1 wherein said rocker member comprises an arcuately curved rigid member.
Claim 10
Dependent Claim
32 words
The invention in accordance with claim 1 further including a pulley member drivingly engaging said crank member and an adjustable cleaning brush disposed in the path of movement of said picker fingers.
Claim 11
Dependent Claim
27 words
The invention in accordance with claim 6 wherein the uppermost one of said confronting stop members is castellated effective to prevent sidewise movement of said resilient members.
References Cited (Backward Citations)
US3820776A
Cited
US4119308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |