US3769868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transverse cutting machine
Assignee: Valmet Deutschland GmbH
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Filing: 1971-04-19
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Granted: 1973-11-06
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Expires: 1991-04-19
Abstract
Abstract A transverse cutting machine has stationary and rotatable blade supports and blades with the stationary blade projecting into the path of rotation of the rotating blade a distance of around 0.1 millimeter. One of the blades is fixed in its support, and the other blade is fixed on its support against movement in the direction of the cutting force. This other blade is formed with a curved surface at one end leading into its cutting edge so that, on contact with the fixed blade, it displaces or deflects in a direction normal to the direction of the cutting force against a pressurized fluid bias provided by an expansible, pressurized tube which also affords a quick release for blade changing. Because of the permitted deflection, blade tolerances during setup are not critical, and the control exercised over the fluid bias permits easy adjustment of cutting forces. In one embodiment, the biased blade is the rotatable blade, and in another embodiment, the biased blade is the stationary blade.
Inventors
- 👤 H Hornung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:49
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/25; B26D1/34; B26D1/38; B26D1/385; B23; B23D; B23D25/00; B23D25/12; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/4847; Y10T83/929; Y10T83/9372; Y10T83/9396; Y10T83/9399
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
188 words
A transverse cutting machine comprising a movable blade supporting structure, a first cutting blade carried on the movable supporting structure and having a cutting edge movable through a given path during movement of the movable supporting structure, a stationary supporting structure, a second cutting blade carried on the stationary supporting structure and having a cutting edge projecting into said given path to cause contact between the first and second blades, first mounting means mounting one of said first and second blades on its supporting structure, and second mounting means for mounting the other of the first and second blades on its supporting structure, said second mounting means holding the blade substantially against movement in the direction of the cutting force developed by contact between the first and second blades and mounting the blade for movement along its entire length in the same direction generally perpendicular to the direction of said cutting force, said second mounting means including biasing means acting on the blade to permit movement of the blade along its entire length against the bias in a direction generally perpendicular to the direction of said cutting force.
Claim 2
Dependent Claim
188 words
A transverse cutting machine comprising a movable blade supporting structure, a first cutting blade carried on the movable supporting structure and having a cutting edge movable through a given path during movement of the movable supporting structure, a stationary supporting structure, a second cutting blade carried on the stationary supporting structure and having a cutting edge projecting into said given path to cause contact between the first and second blades, first mounting means mounting one of said first and second blades on its supporting structure, and second mounting means for mounting the other of the first and second blades on its supporting structure, said second mounting means holding the blade substantially against movement in the direction of the cutting force developed by contact between the first and second blades and mounting the blade for movement along its entire length in the same direction generally perpendicular to the direction of said cutting force, said second mounting means including biasing means acting on the blade to permit movement of the blade along its entire length against the bias in a direction generally perpendicular to the direction of said cutting force.
Claim 3
Dependent Claim
42 words
The transverse cutting machine set forth in claim 1 including a stop surface on the supporting structures associated with the second mounting means and biasing means biasing the blade against the stop surface to position the biased blade in a normal position.
Claim 4
Dependent Claim
51 words
The transverse cutting machine set forth in claim 2 in which the supporting structure associated with the second mounting means includes a recess extending generally transverse to said given path and having a wall forming said stop surface, said second mounting means and said biasing means being disposed in said recess.
Claim 5
Dependent Claim
28 words
The transverse cutting machine set forth in claim 3 in which the biasing means includes an elongated and expansible pressurized fluid chamber extending generally parallel to the blade.
Claim 6
Dependent Claim
20 words
The transverse cutting machine set forth in claim 1 in which the biasing means includes a variable pressure fluid chamber.
Claim 7
Dependent Claim
38 words
The transverse cutting machine set forth in clAim 5 in which the variable pressure fluid chamber includes an expansible chamber defining member extending generally parallel to the blade along an appreciable part of the length of the blade.
Claim 8
Dependent Claim
54 words
The transverse cutting machine set forth in claim 1 in which the cutting blade mounted by the second mounting means includes a curved surface at one end merging into the cutting edge and facing toward the cutting blade mounted by the first mounting means as the first and second cutting blades move into contact.
Claim 9
Dependent Claim
21 words
The transverse cutting machine set forth in claim 1 in which the movable blade supporting structure is mounted for rotary movement.
Claim 10
Dependent Claim
23 words
The transverse cutting machine set forth in claim 8 in which the second mounting means is carried on the movable blade supporting structure.
Claim 11
Dependent Claim
23 words
The transverse cutting machine set forth in claim 8 in which the second mounting means is carried on the stationary blade supporting structure.
Claim 12
Dependent Claim
96 words
The transverse cutting machine set forth in claim 1 in which the second mounting means includes a rigid supporting surface, blade holding means carrying the blade and engaging the rigid supporting surface to substantially prevent movement of the blade and blade holding means in said direction of the cutting force, said rigid supporting surface and said blade holding means defining a pivotal support permitting movement of the blade and blade holding means along the length of the blade in said direction generally perpendicular to the direction of the cutting force by acting against said biasing means.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |