US3786705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for slitting moving webs
Assignee: Lenox Machine Co Inc
•
Filing: 1971-08-31
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Granted: 1974-01-22
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Expires: 1991-08-31
Abstract
Abstract Each one of the blades forming a web slitting blade pair and positioned at opposite sides of the web adjacent each other is provided with separate moving means. The separate moving means for a blade pair are connected to each other outside the web so that the blades may be moved together the web being between them and regardless whether the blades are in contact with each other in a cutting position or separated from each other in an inactive position. The blade moving means for the blades of a pair may comprise two threaded spindles extending along rail or the like on which blade supporting carriages are movable driven by said spindles. Further may a registering device be connected to the blade moving means to register the positions of all the blades and to transmit the information to a computer controlling the slitting operation.
Inventors
- 👤 G Dorfel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:57
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/26; B26D7/2628; B26D7/2635; Y; Y10; Y10T; Y10T83/00; Y10T83/162; Y10T83/173; Y10T83/175; Y10T83/647; Y10T83/6584; Y10T83/6592; Y10T83/6595; Y10T83/768; Y10T83/7809; Y10T83/7847
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
157 words
An apparatus for slitting moving webs of material and of the type having blade pairs for cutting the web longitudinally into at least two narrower webs, which comprises blade pairs movable in the transversal direction of the web along guide means, separate moving means for each one of the blades positioned adjacent to each other on opposite sides of the web and forming a blade pair, said moving means comprising a pair of separate endless belts which are connected to each other outside the web, the blades being movable in pairs with the web between them when the blades of the blade pair are in contact with each other in a cutting position and when the blades of the blade pair are separated from each other in an inactive position, carrying means for moving the blades with said belts and a double-acting locking device for locking the carrying means to said belts and to said guide means.
Claim 2
Independent Claim
157 words
An apparatus for slitting moving webs of material and of the type having blade pairs for cutting the web longitudinally into at least two narrower webs, which comprises blade pairs movable in the transversal direction of the web along guide means, separate moving means for each one of the blades positioned adjacent to each other on opposite sides of the web and forming a blade pair, said moving means comprising a pair of separate endless belts which are connected to each other outside the web, the blades being movable in pairs with the web between them when the blades of the blade pair are in contact with each other in a cutting position and when the blades of the blade pair are separated from each other in an inactive position, carrying means for moving the blades with said belts and a double-acting locking device for locking the carrying means to said belts and to said guide means.
Claim 3
Dependent Claim
39 words
An apparatus according to claim 1, further comprising a registering device connected to the moving means for the blades to register the positions of all the blades and to transmit the information for computer control of the slitting apparatus.
Claim 4
Dependent Claim
34 words
An apparatus according to claim 1, whrein the guide means are rails and said endless belts extend over the length of the rails and are driven together by driving devices fitted outside the web.
Claim 5
Dependent Claim
62 words
An apparatus according to claim 3, wherein the double-acting locking device for locking the belts to the carrying means comprises a double-acting pressure medium driven piston which locks the carrying means to the belt for moving when it is pressed in one direction, and locks the carrying means to the rail after the moving when it is pressed in the other direction.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |