US3739968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Registration control timing switch for web-processing machine
Assignee: Paper Machinery Corp
•
Filing: 1971-12-29
•
Granted: 1973-06-19
•
Expires: 1991-12-29
Abstract
Abstract Web-cutting apparatus wherein an individual cutting zone on a web must be properly positioned (i.e., in register) relative to a cutting blade at a predetermined time to insure a proper cut requires control means, including a timing or selector switch, for determining if registry exists and for making appropriate changes in web speed if it does not. The timing or selector switch comprises a rotatable shaft synchronized with operation of the cutting blade. A pair of ferrous metal discs are mounted on and rotatable with the shaft. Each disc has a notch in its periphery, and a pair of magnetic pickup devices, one for each disc, are mounted in fixed positions relative to their respective discs. Each pickup device provides an electrical pulse upon passage of the notch in its associated disc as the latter rotates. The interval between the pulses produced by the two pickups for each rotation of the shaft serves as the desired time interval. The duration of the time interval can be varied by changing the angular distance between the pickup devices by moving either one or both to a different position. The time interval itself can be shifted by changing the positions of both pickup devices without changing the angular distance between them to effect advancement or retardation of the web to achieve registry.
Inventors
- 👤 R Bodendoerfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:48
CPC Classifications
B; B26; B26D; B26D5/00; B26D5/20; B26D5/30; B26D5/34; D; D06; D06H; D06H7/00; Y; Y10; Y10T; Y10T83/00; Y10T83/141; Y10T83/148
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
367 words
Web processing apparatus for a web containing repeated designs and corresponding register marks comprising: a processing device operable to perform a process on each design, feed means for repeatedly feeding a predetermined length of web to said processing device, and metering means for supplying a predetermined length of web to said feed means, said metering means normally operating at a constant speed when said designs are in registry with said processing device, and control means for said web processing apparatus for maintaining the designs in registry with said processing device, said control means comprising: correction means operable to momentarily change the speed of said metering means to supply a different length of web to said feed means, scanning means in fixed location with respect to said processing device for sensing passage of a register mark and for providing a register mark pulse in response thereto, a selector switch responsive to thE position of said processing device for providing output signals for each cycle of operation of said processing device definitive of a scanning interval during which a process will be performed on a design by said processing device, said scanning interval comprising advance, retard and in-register zones, and a control circuit for comparing the relationship of a register mark pulse to a scanning interval and for providing a correction signal to said correction means in the event said register mark pulse occurs at a time during said scanning interval other than in the in-register zone; said selector switch comprising: a pair of pulse producing means for producing a pair of output pulses spaced apart in time which define the limits of said scanning interval for a cycle of operation of said processing device, first adjustable means for selectively changing the length of the spacing between said pulse producing means to change the time interval between said pair of pulses to change the width of said scanning interval, and second adjustable means for selectively changing the position of at least one of said pulse producing means to shift one end of the time interval with respect to the cycle of operation of the processing device so as to shift the scanning interval with respect to the processing device.
Claim 2
Dependent Claim
367 words
Web processing apparatus for a web containing repeated designs and corresponding register marks comprising: a processing device operable to perform a process on each design, feed means for repeatedly feeding a predetermined length of web to said processing device, and metering means for supplying a predetermined length of web to said feed means, said metering means normally operating at a constant speed when said designs are in registry with said processing device, and control means for said web processing apparatus for maintaining the designs in registry with said processing device, said control means comprising: correction means operable to momentarily change the speed of said metering means to supply a different length of web to said feed means, scanning means in fixed location with respect to said processing device for sensing passage of a register mark and for providing a register mark pulse in response thereto, a selector switch responsive to thE position of said processing device for providing output signals for each cycle of operation of said processing device definitive of a scanning interval during which a process will be performed on a design by said processing device, said scanning interval comprising advance, retard and in-register zones, and a control circuit for comparing the relationship of a register mark pulse to a scanning interval and for providing a correction signal to said correction means in the event said register mark pulse occurs at a time during said scanning interval other than in the in-register zone; said selector switch comprising: a pair of pulse producing means for producing a pair of output pulses spaced apart in time which define the limits of said scanning interval for a cycle of operation of said processing device, first adjustable means for selectively changing the length of the spacing between said pulse producing means to change the time interval between said pair of pulses to change the width of said scanning interval, and second adjustable means for selectively changing the position of at least one of said pulse producing means to shift one end of the time interval with respect to the cycle of operation of the processing device so as to shift the scanning interval with respect to the processing device.
Claim 3
Dependent Claim
46 words
The combination according to claim 1 wherein said pulse producing means comprises a support, a pair of pickup devices mounted on said support, and rotatable means synchronized with the cycle of operation of said processing device for causing said pickup devices to produce said output pulses.
Claim 4
Dependent Claim
28 words
The combination according to claim 2 wherein said first adjustable means in said selector switch comprises means for changing the angular distance between said pair of pickup devices.
Claim 5
Dependent Claim
33 words
The combination according to claim 3 wherein said second adjustable means in said selector switch comprises means for changing the relative angular relationship between said pair of pickup devices and said rotatable means.
Claim 6
Dependent Claim
47 words
The combination according to claim 4 including a shaft rotatable on said support and on which said rotatable means are fixed, and wherein said first and second adjustable means comprise a pair of movable yokes mounted on said support, each yoke supporting one of said pickup devices.
Claim 7
Dependent Claim
37 words
The combination according to claim 5 wherein said rotatable means comprise a pair of discs mounted on said shaft, each disc being associated with one pickup device and having means thereon for actuating its associated pickup device.
Claim 8
Dependent Claim
33 words
The combination according to claim 6 wherein said pickup devices are magnetic pickup devices and wherein the means on each disc for actuating an associated pickup device is a discontinuity in the disc.
References Cited (Backward Citations)
US3097844A
Cited
US3648911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |