US3743413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printer/plotter sheet transport with web cutting means
Assignee: RTX Corp
•
Filing: 1970-08-26
•
Granted: 1973-07-03
•
Expires: 1990-08-26
Abstract
Abstract Paper from a continuous roll is fed into a loop by first rollers at a given speed and out of the loop by second rollers at a lower speed, the first rollers are stopped to permit tear-free cutting of the paper into sheets after the first rollers have rotated sufficient times to pass a length of paper equivalent to the desired length of sheet indicated by controllable settings. Restarting of the first rollers is timed to permit successive sheets to pass to the second rollers with a minimum, selectible intersheet spacing. Individual jam detection, for several sheets concurrently within the transport, is effected by utilizing a shift register to shift bits inserted therein in timed relation with the passage of related sheets, successive bits concurrently in the register corresponding to related successive sheets concurrently within the transport. Sheets are logged in and logged out to cause the transport to run until all sheets are clear. The above features are provided in a variable speed paper transport.
Inventors
- 👤 D Sharp
- 👤 D Modeen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:29
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6517; G03G15/6523; G03G15/22; G03G15/28; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/4455; Y10T83/4458; Y10T83/446; Y10T83/525; Y10T83/54
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
240 words
A web transport apparatus adapted for handing an image receiving web, comprising: feed means for advancing a continuous length of the image receiving web through a first station at a first speed; transport means for receiving the web from said feed means and for continuously feeding the web at a speed less than said first speed past a plurality of additional stations operative upon a sheet to be cut from said web to create an image thereon; means for generating a signal representation of the actual length of the web fed past said first station; means presenting a signal representation of a desired sheet length; means for comparing said actual length signal with said desired length signal and for generating a cut command signal in response to a given relationship therebetween; means responsive to said cut command signal for halting the operation of said feed means; a paper cutter disposed between said first station and said transport means, said cutter responsive to said cut command signal to cut a sheet of such desired length from the web; tailgate means for generating a signal representation of the length of the sheet between said first station and said transport means; and means responsive to said tailgate means for causing resumption of operation of said feed means in response to a signal representation indicative of a desired length of sheet and an intersheet gap remaining between said first station and said transport means.
Claim 2
Dependent Claim
240 words
A web transport apparatus adapted for handing an image receiving web, comprising: feed means for advancing a continuous length of the image receiving web through a first station at a first speed; transport means for receiving the web from said feed means and for continuously feeding the web at a speed less than said first speed past a plurality of additional stations operative upon a sheet to be cut from said web to create an image thereon; means for generating a signal representation of the actual length of the web fed past said first station; means presenting a signal representation of a desired sheet length; means for comparing said actual length signal with said desired length signal and for generating a cut command signal in response to a given relationship therebetween; means responsive to said cut command signal for halting the operation of said feed means; a paper cutter disposed between said first station and said transport means, said cutter responsive to said cut command signal to cut a sheet of such desired length from the web; tailgate means for generating a signal representation of the length of the sheet between said first station and said transport means; and means responsive to said tailgate means for causing resumption of operation of said feed means in response to a signal representation indicative of a desired length of sheet and an intersheet gap remaining between said first station and said transport means.
Claim 3
Dependent Claim
272 words
A web transport apparatus, comprising: feed means having first rollers operating at a first speed for advancing a continuous length of image receiving web along a path; transport means having a plurality of second rollers for receiving the web from said feed means and for continuously feeding the web past a plurality of stations operative upon a sheet to be cut from the web to create an image thereon, said second rollers operating at a speed less than said first speed; means sensing the revolutions of said first rollers; means responsive to said first roller revolution sensing means for generating a count signal representation of the actual length of the web fed therethrough; means presenting a signal representation of a desired sheet length; means for comparing said actual length signal with said desired sheet length signal to generate a cut command signal when the actual length equals the desired sheet length; means responsive to said cut command signal for halting the operation of said feed means; a paper cutter disposed between said first and second rollers, said cutter responsive to said cut command signal to cut a sheet of such desired length from the web; means sensing the revolutions of said second rollers; differential count means concurrently responsive to said first and second roller sensing means to maintain a count proportional to the length of the sheet remaining between said first and second rollers; and means responsive to said differential count means to cause resumption of operation of said feed means in response to an output thereof indicative of a desired length of sheet and an intersheet gap remaining between said rollers.
Claim 4
Dependent Claim
272 words
A web transport apparatus, comprising: feed means having first rollers operating at a first speed for advancing a continuous length of image receiving web along a path; transport means having a plurality of second rollers for receiving the web from said feed means and for continuously feeding the web past a plurality of stations operative upon a sheet to be cut from the web to create an image thereon, said second rollers operating at a speed less than said first speed; means sensing the revolutions of said first rollers; means responsive to said first roller revolution sensing means for generating a count signal representation of the actual length of the web fed therethrough; means presenting a signal representation of a desired sheet length; means for comparing said actual length signal with said desired sheet length signal to generate a cut command signal when the actual length equals the desired sheet length; means responsive to said cut command signal for halting the operation of said feed means; a paper cutter disposed between said first and second rollers, said cutter responsive to said cut command signal to cut a sheet of such desired length from the web; means sensing the revolutions of said second rollers; differential count means concurrently responsive to said first and second roller sensing means to maintain a count proportional to the length of the sheet remaining between said first and second rollers; and means responsive to said differential count means to cause resumption of operation of said feed means in response to an output thereof indicative of a desired length of sheet and an intersheet gap remaining between said rollers.
Claim 5
Dependent Claim
105 words
A web transport apparatus according to claim 2 wherein said differential count means comprises: an up/down counter, the count of said counter being incremented by said first roller sensing means and decremented by said second roller sensing means, whereby the count thereof is indicative of the length of sheet remaining between said rollers, said differential count means further comprising: means for selectively presetting the count in said counter whereby the count thereof comprises an indication of the sum of the length of sheet between said roller and a desired intersheet spacing represented by the amount by which said count is advanced by said selective presetting.
References Cited (Backward Citations)
US3418047A
Cited
US3524371A
Cited
US3406601A
Cited
US3513741A
Cited
US3538726A
Cited
US3504586A
Cited
US3639055A
Cited
US3639053A
Cited
US3645157A
Cited
US3670614A
Cited
US3654830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |