Patent US1080620A successfully refreshed from Google Patents.
US3921484A
Expired / Lapsed
US
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Flying shear for dividing moving sheet-metal strip
Assignee: L Schuler GmbH
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Filing: 1975-01-20
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Granted: 1975-11-25
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Expires: 1995-01-20
Abstract
Abstract Flying shear apparatus for cross-cutting moving sheet material including upper and lower cutting bars movable together in the travel direction of the sheet material and reciprocating means for moving the lower cutter bar in a cutting direction towards said upper bar and transverse to the travel direction. The reciprocating means includes a drive shaft rotatable at a continuous rotational speed, a crank member rotatable with said drive shaft, a coupling member having one end connected to the crank member and the other end connected with one end of a swivel arm, which swivel arm has the other end formed as the lower cutting bar.
Inventors
- 👤 Otto Rasenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:16
CPC Classifications
B; B23; B23D; B23D25/00; B23D25/02; B23D25/04; F; F16; F16H; F16H21/00; F16H21/04; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4757; Y10T83/4763
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
219 words
Flying shear apparatus for cross-cutting moving sheet material comprising: a first cutting bar, a second cutting bar, first reciprocating means for reciprocating both of said bars in the travel direction of the sheet material, said first reciprocating means including a movable driving member attached to only one of said cutting bars and guide means interconnecting said cutting bars with one another for movement together in the travel direction, and second reciprocating means for reciprocating said first bar relative to said second bar in a cutting direction transverse to said travel direction, said first and second cutting bars being positioned in opposing relationship to one another such that said cutting bars cooperate to cut said sheet material upon a predetermined relative movement of said cutting bars in the cutting direction, said second reciprocating means including a rotatable drive shaft and drive train means drivingly connecting said drive shaft to said first bar, said drive train means including a coupling member and a swivel arm, one end of said coupling member being connected to a crank member rotatable with said drive shaft and the other end of said coupling member being pivotally connected with one end of said swivel arm, wherein the other end of said swivel arm is non-pivotally connected with said first bar for movement with said first bar.
Claim 2
Dependent Claim
219 words
Flying shear apparatus for cross-cutting moving sheet material comprising: a first cutting bar, a second cutting bar, first reciprocating means for reciprocating both of said bars in the travel direction of the sheet material, said first reciprocating means including a movable driving member attached to only one of said cutting bars and guide means interconnecting said cutting bars with one another for movement together in the travel direction, and second reciprocating means for reciprocating said first bar relative to said second bar in a cutting direction transverse to said travel direction, said first and second cutting bars being positioned in opposing relationship to one another such that said cutting bars cooperate to cut said sheet material upon a predetermined relative movement of said cutting bars in the cutting direction, said second reciprocating means including a rotatable drive shaft and drive train means drivingly connecting said drive shaft to said first bar, said drive train means including a coupling member and a swivel arm, one end of said coupling member being connected to a crank member rotatable with said drive shaft and the other end of said coupling member being pivotally connected with one end of said swivel arm, wherein the other end of said swivel arm is non-pivotally connected with said first bar for movement with said first bar.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1, wherein a portion of said other end of said swivel arm constitutes said first bar.
Claim 4
Dependent Claim
118 words
Apparatus according to claim 2, wherein said guide means includes a guide member and first and second guide arms, said guide member being pivotally connected to one of said cutting bars at a position intermediate the ends of said guide member, said first guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to an end of said guide member, said second guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to the end of said guide member which is opposite the end of said guide member connected to said first guide arm.
Claim 5
Dependent Claim
67 words
Apparatus according to claim 2, wherein the guide means and drive train means are constructed such that the motion component of the pivot connection of the swivel arm with the coupling member and parallel to the direction of motion of the second cutting bar is slightly delayed, from the beginning of the cutting operation, with respect to the synchronism with the motion of the second cutting bar.
Claim 6
Dependent Claim
118 words
Apparatus according to claim 4, Wherein said guide means includes a guide member and first and second guide arms, said guide member being pivotally connected to one of said cutting bars at a position intermediate the ends of said guide member, said first guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to an end of said guide member, said second guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to the end of said guide member which is opposite the end of said guide member connected to said first guide arm.
Claim 7
Dependent Claim
52 words
Apparatus according to claim 3, further comprising cutting stroke control means for varying the distance the first bar moves in the cutting direction towards said second bar independently of the rotational speed of the drive shaft, said cutting stroke control means including means engaged with a member of said drive train means.
Claim 8
Dependent Claim
44 words
Apparatus according to claim 6, wherein said cutting stroke control means includes a press rod having one end thereof connected to a pivot axle intermediate the ends of said coupling member and means for changing the position of said press rod and pivot axle.
References Cited (Backward Citations)
US3800646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |