Patent US2196600A successfully refreshed from Google Patents.
Patent US3722879A successfully refreshed from Google Patents.
US3722879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for document stackers
Assignee: International Business Machines Corp
•
Filing: 1972-03-06
•
Granted: 1973-03-27
•
Expires: 1992-03-06
Abstract
Abstract A document level sensor for controlling movement of a platform as documents stack thereon. A document tail kicker carries a shutter plate for blocking light normally impinging upon a light sensitive detector. A document sensor is placed upstream of the stacker platform at a distance less than the minimum distance between documents. The outputs of the light sensitive detector and the document detector are connected to a logic circuit requiring simultaneous outputs from each so as to develop a signal for actuating a motor. The motor drives a lead screw for lowering the stacker platform. The logic circuit also detects a stacker full or stacker jam condition. The stacker full condition is detected by sensing the output of the light sensitive detector, the output of the document detector and a lower limit switch. The stacker jam condition is detected by sensing the occurrence of two successive signals directing the stacker platform to be lowered and an output from the light sensitive detector.
Inventors
- 👤 D Johnston
- 👤 M Nyberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:38
CPC Classifications
G; G06; G06K; G06K13/00; G06K13/02; G06K13/08; G06K13/14; B; B65; B65H; B65H31/00; B65H31/04; B65H31/08; B65H31/10; B65H31/12; B65H31/18; B65H2405/00; B65H2405/10; B65H2405/11; B65H2405/111; B65H2405/1115; B65H2405/11152
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
144 words
Apparatus for controlling an article stacker comprising an article support for collecting articles delivered thereto inseriatum, said article support having one end positioned at said article delivery position, article deflecting means located at said article delivery position to be actuated by the leading portion of a delivered article and responsive to being actuated to deflect the trailing portion of said delivered article toward said article support, article deflecting sensing means for generating an indication upon detecting said article deflecting means in said actuated position, article sensing means for generating an indication in response to an article approaching said delivery position, said article sensing means being positioned relative to said article deflecting sensing means a distance less than the distance between articles, and means for generating a control indication in response to simultaneous indications from said article deflecting sensing means and said article sensing means.
Claim 2
Dependent Claim
144 words
Apparatus for controlling an article stacker comprising an article support for collecting articles delivered thereto inseriatum, said article support having one end positioned at said article delivery position, article deflecting means located at said article delivery position to be actuated by the leading portion of a delivered article and responsive to being actuated to deflect the trailing portion of said delivered article toward said article support, article deflecting sensing means for generating an indication upon detecting said article deflecting means in said actuated position, article sensing means for generating an indication in response to an article approaching said delivery position, said article sensing means being positioned relative to said article deflecting sensing means a distance less than the distance between articles, and means for generating a control indication in response to simultaneous indications from said article deflecting sensing means and said article sensing means.
Claim 3
Dependent Claim
179 words
Apparatus for controlling an article stacker including a bi-directional movable support for collecting articles delivered thereto inseriatum, drive means coupled to said support to move the same bi-diRectionally and control means for controlling said drive means said control means comprising: article deflecting means located at said article delivery position to be actuated by the leading portion of a delivered article and responsive to being actuated to deflect the trailing portion of said delivered article toward said article support, first sensing means for generating a signal upon detecting said article deflecting means in said actuated position, second sensing means for generating a signal in response to an article approaching said delivery position, said second sensing means being positioned relative to said article deflecting sensing means a distance less than the distance between articles control signal generating means for generating a control signal in response to simultaneous signals from said first and second sensing means, and means for supplying said control signal to said drive means to cause the same to move said support a pre-determined amount in a pre-determined direction.
Claim 4
Dependent Claim
179 words
Apparatus for controlling an article stacker including a bi-directional movable support for collecting articles delivered thereto inseriatum, drive means coupled to said support to move the same bi-diRectionally and control means for controlling said drive means said control means comprising: article deflecting means located at said article delivery position to be actuated by the leading portion of a delivered article and responsive to being actuated to deflect the trailing portion of said delivered article toward said article support, first sensing means for generating a signal upon detecting said article deflecting means in said actuated position, second sensing means for generating a signal in response to an article approaching said delivery position, said second sensing means being positioned relative to said article deflecting sensing means a distance less than the distance between articles control signal generating means for generating a control signal in response to simultaneous signals from said first and second sensing means, and means for supplying said control signal to said drive means to cause the same to move said support a pre-determined amount in a pre-determined direction.
Claim 5
Dependent Claim
58 words
The apparatus for controlling an article stacker as in claim 2 further comprising limit switch means for generating a signal in response to said movable support reaching a pre-determined position, and means for generating a signal for indicating a stacker full condition in response to signals from said first and second sensing means, and said limit switch means.
Claim 6
Dependent Claim
41 words
The apparatus for controlling an article stacker of claim 2 further comprising means for generating a stacker jam condition in response to detecting two successive signals from said control signal generating means simultaneously with a signal from said first sensing means.
Claim 7
Dependent Claim
77 words
The apparatus for controlling an article stacker as in claim 2 wherein said control signal generating means comprises a logical AND circuit having inputs connected to said first and second sensing means to generate an output signal when signals are simultaneously present from said first and second sensing means, and single shot multivibrator means connected to be fired by an output signal from said logical AND circuit to provide a control signal having a predetermined time duration.
Claim 8
Dependent Claim
113 words
The apparatus for controlling an article stacker as in claim 3 wherein said means for generating a signal for indicating a stacker full condition comprises a logical AND circuit having inputs connected to receive signals from said limit switch means and from said first and second sensing means to provide an output signal when signals are simultaneously present from said first and second sensing means and said limit switch means, and a bi-stable logical circuit element connected to said AND circuit to be switched to a set state upon receiving an output signal from said logical AND circuit, said bi-stable logical circuit element providing a stacker full indication when in its set state.
Claim 9
Dependent Claim
130 words
The apparatus for controlling an article stacker as in claim 4 wherein said means for generating a stacker jam condition comprises a bistable logical circuit element switchable to a set state in response to a signal from said control signal generating means and switchable to a re-set state in response to the absense of a signal from said control signal generating means, and a logical AND circuit connected to receive a signal from said bi-stable logical circuit element when the same is in its set state and to receive a signal from said control signal generating means, said AND circuit providing an output signal when said bi-stable logical circuit element is in its set state and said control signal generating means is simultaneously providing a signal to said AND circuit.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |