US3564960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic copy machine copy paper length error compensating system
Assignee: GAF Corp
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Filing: 1969-04-18
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Granted: 1971-02-23
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Expires: 1989-04-18
Abstract
Abstract As an original moves forward, a trailing edge sensor sends an initial cutting signal to a super-precise electronic timer having a capacitor that has already received a voltage generated by the actual speed of advance of the end portion of a strip of copy paper, so that when a regulated voltage is applied to the capacitor, the charging interval of the capacitor is controlled, so that any tendency for lengths to be cut too short or too long is corrected automatically when the capacitor discharges and thereby produces an actual cutting signal for operating a cutter to sever the strip. In the case of ''''flying'''' cuts, the strip speed voltage assists, and in the case of strip ''''standstill'''' cuts, such voltage ''''bucks'''' the charging current of the regulated voltage.
Inventors
- 👤 Edwin D Foulks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:16
CPC Classifications
B; B23; B23D; B23D36/00; B23D36/0008; B23D36/0033; B23D36/0041; B23D36/005; G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/4443; Y10T83/4455; Y10T83/465; Y10T83/4653; Y10T83/4656; Y10T83/4664; Y10T83/525; Y10T83/533
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
222 words
An automatic copy machine paper length error compensating system for precision-timing the operation of a cutter for severing a length from the end portion of a strip of copy paper when the latter is advanced sufficiently for such length to be cut therefrom to correspond to that of an original when the trailing edge of the latter causes a sensor to produce an initial cutting signal, comprising: a super-precise timer circuit containing a capacitor, the charging time of which controls an interval between receipt of such initial cutting signal and the output of an actual cutting signal for controlling the cutting operation of such cutter; means acting to apply to said capacitor a DC voltage the value of which is proportional to the actual speed of advance of the end portion of the strip immediately prior to being cut; and means acting in response to such initial cutting signal to connect said circuit to a regulated source of DC voltage for charging said capacitor to the extent permitted by such strip transit speed voltage to control the actual charging time to the capacitor, which upon discharge produces such actual cutting signal for operating the cutter at the precise time required for severing the strip, thereby compensating for any error in copy paper lengths over a substantial range of speed in strip advances.
Claim 2
Dependent Claim
222 words
An automatic copy machine paper length error compensating system for precision-timing the operation of a cutter for severing a length from the end portion of a strip of copy paper when the latter is advanced sufficiently for such length to be cut therefrom to correspond to that of an original when the trailing edge of the latter causes a sensor to produce an initial cutting signal, comprising: a super-precise timer circuit containing a capacitor, the charging time of which controls an interval between receipt of such initial cutting signal and the output of an actual cutting signal for controlling the cutting operation of such cutter; means acting to apply to said capacitor a DC voltage the value of which is proportional to the actual speed of advance of the end portion of the strip immediately prior to being cut; and means acting in response to such initial cutting signal to connect said circuit to a regulated source of DC voltage for charging said capacitor to the extent permitted by such strip transit speed voltage to control the actual charging time to the capacitor, which upon discharge produces such actual cutting signal for operating the cutter at the precise time required for severing the strip, thereby compensating for any error in copy paper lengths over a substantial range of speed in strip advances.
Claim 3
Dependent Claim
78 words
The invention as defined by claim 1, in which the copy paper strip comes to a standstill for cutting by the cutter immediately after the advance of the end portion thereof, and the strip speed voltage is applied to said capacitor in ''''bucking'''' relation to that of the regulated voltage, whereby decreases in cut lengths due to increases in paper strip transit speeds are automatically compensated for by corresponding delay in the actual charging time of the capacitor.
Claim 4
Dependent Claim
66 words
The invention as defined by claim 1, in which the paper strip is cut on the ''''fly'''' while advancing, and the strip speed voltage is applied to said capacitor in the same relation as that of the regulating voltage, whereby increases in cut lengths due to increases in paper strip transit speeds are compensated for by corresponding decreases in the actual charging time of the capacitor.
Claim 5
Dependent Claim
35 words
The invention as defined by claim 1, in which switching means are provided for selectively applying the strip speed voltage to the capacitor in either ''''bucking,'''' or assisting relation, to that of such regulated voltage.
Claim 6
Dependent Claim
29 words
The invention as defined by claim 1, in which means including adjusTable resistors are provided for adjusting the strip speed voltage and the regulated voltage applied to said capacitor.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |