US3735978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for stacking copy sheets
Assignee: Xerox Corp
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Filing: 1970-09-09
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Granted: 1973-05-29
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Expires: 1990-09-09
Abstract
Abstract A system for producing finished sets of collated copies from precollated documents fed and copied in repeated cycles including a side stacking assembly for grouping sheets into separately identifiable stacks by the action of pivotable paddle wheels. A control logic enables side stacking the sheets into separately identifiable bundles.
Inventors
- 👤 L H Turner
- 👤 R A Manzek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:35
CPC Classifications
B; B42; B42C; B42C1/00; B42C1/12; B65; B65H; B65H39/00; B65H39/02; B65H39/04; B65H2404/00; B65H2404/10; B65H2404/11; B65H2404/111; B65H2404/1114
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
Sheet stacking apparatus comprising tray means for receiving sheet material transported along a sheet path and adapted for lowering as sheet material is received thereon, a frame pivotally mounted in overlying relation to said tray means, shaft means journaled in said frame for rotation relative thereto, paddle means including a plurality of flexible blade members mounted on each end of said shaft means, control means to cause said frame to pivot to position a one of said paddle means and then the other into contact with a corresponding side of the sheet material being received in said tray means at predetermined intervals so that a sideways force may be imparted to the sheet material at right angles to the sheet path.
Claim 2
Dependent Claim
121 words
Sheet stacking apparatus comprising tray means for receiving sheet material transported along a sheet path and adapted for lowering as sheet material is received thereon, a frame pivotally mounted in overlying relation to said tray means, shaft means journaled in said frame for rotation relative thereto, paddle means including a plurality of flexible blade members mounted on each end of said shaft means, control means to cause said frame to pivot to position a one of said paddle means and then the other into contact with a corresponding side of the sheet material being received in said tray means at predetermined intervals so that a sideways force may be imparted to the sheet material at right angles to the sheet path.
Claim 3
Dependent Claim
24 words
Apparatus according to claim 1 wherein said tray means includes a sensing circuit for maintaining a constant level of sheet material being received thereon.
Claim 4
Dependent Claim
20 words
Apparatus according to claim 2 wherein said shaft means is continuously driven by a motor positioned at one end thereof.
Claim 5
Dependent Claim
31 words
Apparatus according to claim 3 wherein said control means includes a solenoid which receives discrete electrical signals and a solenoid actuated member connected to said shaft means at one end thereof.
Claim 6
Dependent Claim
150 words
In a copier machine for producing collated sets of copies from documents advanced from a supply source to a platen and then returned to the supply source in repeated cycles, sheet stacking apparatus comprising tray means receiving sheet material transported along a sheet path and adapted for lowering as sheet material is accumulated thereon, a frame pivotally mounted in overlying relation to said tray means, shaft means journaled in said frame, paddle means having a plurality of flexible blade members mounted on each end of said shaft means for rotation therewith, and control means to cause said frame to pivot to position a one of said paddle means and then the other onto contact with a corresponding side of the sheet material being received in said tray means at predetermined intervals so that a sideways force may be imparted to the sheet material at right angles to the sheet path.
Claim 7
Dependent Claim
150 words
In a copier machine for producing collated sets of copies from documents advanced from a supply source to a platen and then returned to the supply source in repeated cycles, sheet stacking apparatus comprising tray means receiving sheet material transported along a sheet path and adapted for lowering as sheet material is accumulated thereon, a frame pivotally mounted in overlying relation to said tray means, shaft means journaled in said frame, paddle means having a plurality of flexible blade members mounted on each end of said shaft means for rotation therewith, and control means to cause said frame to pivot to position a one of said paddle means and then the other onto contact with a corresponding side of the sheet material being received in said tray means at predetermined intervals so that a sideways force may be imparted to the sheet material at right angles to the sheet path.
Claim 8
Independent Claim
102 words
A method of stacking sheets into separated bundles comprising the steps of collecting sheet material transported along a path in a receiving tray, contacting the sheet material surface with rotating members positioned at the sides of the sheet path by pivoting the members to a first position to contact the sheet material surface first on one side anD then to a second position to contact the sheet material surface on the other side at predetermined intervals so that a sideways force is imparted to the sheet material, and continually lowering the receiving tray to effect a constant level with the sheet path.
Claim 9
Independent Claim
102 words
A method of stacking sheets into separated bundles comprising the steps of collecting sheet material transported along a path in a receiving tray, contacting the sheet material surface with rotating members positioned at the sides of the sheet path by pivoting the members to a first position to contact the sheet material surface first on one side anD then to a second position to contact the sheet material surface on the other side at predetermined intervals so that a sideways force is imparted to the sheet material, and continually lowering the receiving tray to effect a constant level with the sheet path.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |