US4224848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross cutter for rolls of materials
Assignee: Jagenberg Werke AG
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Filing: 1978-09-28
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Granted: 1980-09-30
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Expires: 1998-09-28
Abstract
Abstract A cross cutter for a web of goods comprises 2 coupled cutter rolls which are driven at the moment of cutting in synchronism with the webs of goods. The driving of the rolls is carried out by a driving motor, an adjustable asymmetrical coupler mechanism and a mechanism for controlling the number of revolutions per unit time of the driving motor. The cutter rolls are directly driven by the driving motor and parallel to the asymmetrical mechanism and the control mechanism is receptive of the actual number of revolutions as a control input from the asymmetrical mechanism.
Inventors
- 👤 Dieter Beerenwinkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:57
CPC Classifications
B; B23; B23D; B23D36/00; B23D36/0008; B23D36/0033; B23D36/0041; Y; Y10; Y10T; Y10T83/00; Y10T83/141; Y10T83/159; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/483; Y10T83/4833
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A cross cutter for a moving web, comprising coupled cutter rolls; a driving motor directly coupled to the cutter rolls for driving same; asymmetrical means driven by the driving motor in parallel with the cutter rolls for producing a control output corresponding to the actual number of revolutions per unit time of the motor; and means receptive of the control output for controlling the motor speed to synchronize the cutter rolls with the speed of the moving web.
Claim 2
Dependent Claim
78 words
A cross cutter for a moving web, comprising coupled cutter rolls; a driving motor directly coupled to the cutter rolls for driving same; asymmetrical means driven by the driving motor in parallel with the cutter rolls for producing a control output corresponding to the actual number of revolutions per unit time of the motor; and means receptive of the control output for controlling the motor speed to synchronize the cutter rolls with the speed of the moving web.
Claim 3
Dependent Claim
87 words
A cross cutter according to claim 1, wherein the means for controlling comprises a speed regulator having a P.I.D. characteristic for producing a second control output, a current regulator having a P.I.D. characteristic and which is receptive of the second control output of the speed regulator for producing a third control output, a power amplifier receptive of the third control output of the current regulator and for developing the control input for the driving motor which is also applied as a control input to the current regulator.
Claim 4
Dependent Claim
38 words
A cross cutter according to claim 2, wherein the power amplifier includes thyristor control elements triggered by an impulse generator disposed between the current regulator and the power amplifier, the thyristors enabling current conduction control in both directions.
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) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |