Patent US3747918A successfully refreshed from Google Patents.
US3747918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Document feeder control circuit
Assignee: AB Dick Co
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Filing: 1971-11-22
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Granted: 1973-07-24
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Expires: 1991-11-22
Abstract
Abstract A document feeder transfers original documents placed in a stack one at a time in succession into a copying position on an exposure platen of a copy machine. The control circuit for the feeder includes means for initiating the feeding of an original document from a stack of original documents in the tray of the document feeder into and along a transport path. The control circuit additionally enables the document feeder to expel an original document from the exposure platen of a copy machine after a desired number of copies have been made. The control circuit further includes means to prevent the feeding of further original documents into and along the transport path until the desired number of copies of a previously fed original document are completed. The control circuit further controls the initiation of the copying process of the copy machine. Additionally, means are provided to detect the jamming of an original document during its expulsion from the exposure platen of the copy machine.
Inventors
- 👤 H Margulis
- 👤 R Korff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:20
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/625; G03B27/6264
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
372 words
A device for controlling the operation of an assembly associated with copy-making apparatus for transporting a document from an input station along a transport path past an exposure station to an exit station, said assembly including drive means for transporting said document from said input station along said transport path to said exit station, gating means positioned at said exposure station movable between an open position and a blocking position and feeding means positioned at said input station for feeding said document into said transport path, said device comprising means for initiating the operation of said assembly, first sensing means disposed along said transport path for detecting the presence of said document, second sensing means disposed at said exit station for detecting the presence of said document, means operable at the initiation of the operation of said assembly for moving said gating means to an open position and for energizing said drive means both only for a predetermined time period to remove a document from said exposure station, means for energizing the feeding means to feed a document into the transport path both in response to a signal from said initiating means and also in response to a signal from said second sensing means and for deenergizing the feeding means in response to a signal from said first sensing means, means for moving said gating means to said blocking position both after said predetermined time period and in response to said signal from said second sensing means to provide a means for registering said document at said exposure station in position for exposure by said copy-making apparatus, means for moving said gating means to said open position subsequent to the exposure of said document at said exposure station to enable said document to be transported to said exit station, means for energizing said drive means in response to a signal from said initiating means and also subsequent to the exposure of said document at said exposure station to transport said document along said transport path and means for deenergizing said drive means in response to a signal from said first sensing means to interrupt the transporting of said document at a position in abutment with said gating means at said exposure station.
Claim 2
Independent Claim
372 words
A device for controlling the operation of an assembly associated with copy-making apparatus for transporting a document from an input station along a transport path past an exposure station to an exit station, said assembly including drive means for transporting said document from said input station along said transport path to said exit station, gating means positioned at said exposure station movable between an open position and a blocking position and feeding means positioned at said input station for feeding said document into said transport path, said device comprising means for initiating the operation of said assembly, first sensing means disposed along said transport path for detecting the presence of said document, second sensing means disposed at said exit station for detecting the presence of said document, means operable at the initiation of the operation of said assembly for moving said gating means to an open position and for energizing said drive means both only for a predetermined time period to remove a document from said exposure station, means for energizing the feeding means to feed a document into the transport path both in response to a signal from said initiating means and also in response to a signal from said second sensing means and for deenergizing the feeding means in response to a signal from said first sensing means, means for moving said gating means to said blocking position both after said predetermined time period and in response to said signal from said second sensing means to provide a means for registering said document at said exposure station in position for exposure by said copy-making apparatus, means for moving said gating means to said open position subsequent to the exposure of said document at said exposure station to enable said document to be transported to said exit station, means for energizing said drive means in response to a signal from said initiating means and also subsequent to the exposure of said document at said exposure station to transport said document along said transport path and means for deenergizing said drive means in response to a signal from said first sensing means to interrupt the transporting of said document at a position in abutment with said gating means at said exposure station.
Claim 3
Dependent Claim
76 words
The device defined in claim 1 further comprising timing means having a predetermined time-out period initiated both in response to a signal from said initiating means and in response to said signal from said second sensing means for deactivating said transporting assembly at the expiration of said time-out period, said time-out period being capable of being interrupted in response to a signal from said first sensing means to thereby prevent the deactivation of said transporting assembly.
Claim 4
Dependent Claim
117 words
The device defined in claim 1 further comprising plural jam check means, each having a predetermined time-out period and each being capable of deactivating said transporting assembly at the expiration of its respective time-out period, the time-out period of a first one of said plural jam check means being capable of being interrupted in response to a first portion of said signal from said second sensing means to thereby prevent the deactivation of said transporting assembly, the time-out period of a second one of said plural jam check means being capable of being interrupted in response to a second portion of said signal from said second sensing means to thereby prevent the deactivation of said transporting assembly.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |