US3628788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jam detection device for document stacking
Assignee: Unisys Corp
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Filing: 1970-01-19
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Granted: 1971-12-21
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Expires: 1990-01-19
Abstract
Abstract A stacking device capable of receiving documents, such as checks or standard data processing cards, and more specifically a sensor for detecting a jam of documents during a stacking operation. The sensor, which may be a leaf spring, extends outwardly from behind a kicker spring for propelling documents broadside on the fly onto a stack, into an area adjacent the normally stable position of the face of the accumulating stack. A crumpled document or an advance in the face of the stack will activate the sensor.
Inventors
- 👤 William L Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:09
CPC Classifications
G; G06; G06K; G06K13/00; G06K13/02; G06K13/08; G06K13/12; B; B65; B65H; B65H2301/00; B65H2301/40; B65H2301/42; B65H2301/421; B65H2301/4214
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
In a machine for transporting documents to a storing area wherein said documents are impelled on the fly into a stacking bin having a normally stationary stack face, a jam-sensing device comprising: resilient means normally deflected only by the force of said incoming documents for depositing said documents onto said stack face, and means normally spaced away from said stack face and outside the range of said normal deflection of said resilient means for detecting a jam condition in said bin upon abnormal deflection of said resilient means by the advance of the face of the stack and document contact with said means.
Claim 2
Dependent Claim
103 words
In a machine for transporting documents to a storing area wherein said documents are impelled on the fly into a stacking bin having a normally stationary stack face, a jam-sensing device comprising: resilient means normally deflected only by the force of said incoming documents for depositing said documents onto said stack face, and means normally spaced away from said stack face and outside the range of said normal deflection of said resilient means for detecting a jam condition in said bin upon abnormal deflection of said resilient means by the advance of the face of the stack and document contact with said means.
Claim 3
Dependent Claim
22 words
The device according to claim 1, wherein said means for detecting a jam condition includes a feeler member adjacent said stack face.
Claim 4
Dependent Claim
21 words
The device according to claim 2, wherein said means for detecting a jam includes signalling means activated by said feeler means.
Claim 5
Dependent Claim
79 words
In a document-stacking device having a moveable stacker plate and having a surface at an acute angle thereto forming an open chute area for directing documents onto a stack, a jam detection apparatus comprising: spring means for deflecting incoming documents onto said stacker plate, and jam detection means disposed in said open chute area and associated with said spring means for sensing document crumpling in said open chute area or abnormal deflection of said spring means by accumulating documents.
Claim 6
Dependent Claim
79 words
In a document-stacking device having a moveable stacker plate and having a surface at an acute angle thereto forming an open chute area for directing documents onto a stack, a jam detection apparatus comprising: spring means for deflecting incoming documents onto said stacker plate, and jam detection means disposed in said open chute area and associated with said spring means for sensing document crumpling in said open chute area or abnormal deflection of said spring means by accumulating documents.
Claim 7
Dependent Claim
23 words
The device according to claim 4, wherein said jam detection means includes a feeler member and switching means activated by said feeler member.
Claim 8
Dependent Claim
42 words
The device of claim 4, wherein said spring means includes a substantially U-shaped wire secured only at the open end, and said jam detection means includes sensor means extending through the unattached closed end of said wire into said open chute area.
Claim 9
Dependent Claim
21 words
The device of claim 6, wherein said sensor means includes a feeler member and switching means activated by said feeler member.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |