US3770264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position sensing apparatus
Assignee: Fujitsu Services Ltd
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Filing: 1970-12-10
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Granted: 1973-11-06
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Expires: 1990-12-10
Abstract
Abstract A paper stacker for stacking a continuous paper web in fan-fold form from a printer is disclosed. Rollers having radially projecting resilient fingers engage both folded edges of the web as it is stacked. The rollers are each driven by a motor through a gear secured to the roller shaft. The motor is carried on a plate pivotted about the shaft the plate being held against rotation about the shaft by a spring. When the stack height brings the upper surface of the stack sufficiently close to the rollers the load on the rollers is sufficiently great to cause rotation of the plate against the tension of the spring, thereby making an electrical contact to actuate mechanism for raising the rollers.
Inventors
- 👤 G Sturman
- 👤 F Sinfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:24
CPC Classifications
B; B65; B65H; B65H31/00; B65H31/04; B65H31/08; B65H31/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
195 words
Apparatus for stacking a precreased fan-fold web, including a base member; a framework mounted for movement towards and away from the base member; web feeding means mounted on the framework and operable to feed the web when in an unfolded condition towards the base member such that a stack of refolded web is formed on the base member the stack having opposed edges formed by the precreased folds in the web; a shaft mounted on the framework; a stack edge contacting roll mounted on the shaft, the roll being positioned adjacent to one of said edges so that it comes into contact with the web being fed to assist in the refolding of the web onto the stack as the depth of the stack increases; means operable to rotate the roll; detecting means operable in response to a predetermined increase in the resistance to rotating of the roll consequent upon its contact with the increasing depth of the stack; and driving means operable in response to operation of the detecting means to move the framework away from the base member to allow the edge contacting roll to accomodate to the increasing depth of the stack
Claim 2
Dependent Claim
195 words
Apparatus for stacking a precreased fan-fold web, including a base member; a framework mounted for movement towards and away from the base member; web feeding means mounted on the framework and operable to feed the web when in an unfolded condition towards the base member such that a stack of refolded web is formed on the base member the stack having opposed edges formed by the precreased folds in the web; a shaft mounted on the framework; a stack edge contacting roll mounted on the shaft, the roll being positioned adjacent to one of said edges so that it comes into contact with the web being fed to assist in the refolding of the web onto the stack as the depth of the stack increases; means operable to rotate the roll; detecting means operable in response to a predetermined increase in the resistance to rotating of the roll consequent upon its contact with the increasing depth of the stack; and driving means operable in response to operation of the detecting means to move the framework away from the base member to allow the edge contacting roll to accomodate to the increasing depth of the stack
Claim 3
Dependent Claim
62 words
Apparatus as claimed in claim 1 in which the detecting means includes a plate pivotally mounted on said shaft; spring means resiliently urging the plate towards pivotting in one direction about the shaft; electrical switching means positioned for operation by the plate pivotting in a direction opposite said one direction and in which the said driving means is mounted on the plate.
Claim 4
Dependent Claim
20 words
Apparatus as claimed in claim 2 in which the roll has a plurality of radially arranged fingers of resilient material.
Claim 5
Dependent Claim
66 words
Apparatus as claimed in claim 1 in which the base member with which the stack is in contact is so shaped as to provide first and second outer portions for contacting and supporting the opposed folded edges of the stack, and a third portion intermediate the first and second portions raised relative to the first and second portions for contacting the central portion of tHe stack.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |