US3874975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cutting and welding thermoplastics materials
Assignee: SOFAMECA Sarl
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Filing: 1974-03-18
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Granted: 1975-04-01
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Expires: 1994-03-18
Abstract
Abstract This invention relates to apparatus for cutting and welding thermoplastic materials, particularly in the form of a sheath of indefinite length to divide the sheath longitudinally into a plurality of segments of lesser width, the apparatus includes a cutting blade which may be straight or curved with means for heating it either to a constant temperature or so that different parts are heated to different temperatures. This blade cooperates with a table over the surface of which the starting sheath is passed and thus the said surface also may be flat or curved to match the blade configuration. The blade and the table are relatively moved along the longitudinal axis of the cutting blade so as to vary the length of blade in contact with the sheath. The table, when having a curved surface, may be pivotable about a point: the blade may be suspended by position-adjusting means in a plane perpendicular to the surface of such pivotable table.
Inventors
- 👤 Georges Lagain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:06
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/74; B29C65/743; B29C65/7439; B26; B26D; B26D1/00; B26D1/01; B26D1/02; B26D1/025; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/305; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/13; B29C66/137; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81421; B29C66/81423; B29C66/83; B29C66/836; B29C66/90; B29C66/94; B29C66/944; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1313; Y10T83/00; Y10T83/283; Y10T83/293; Y10T83/647; Y10T83/6584; Y10T83/6603
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
Apparatus for cutting and welding a continuously-fed sheath made of thermoplastics material to divide said sheath into a plurality of segments of lesser width, said apparatus including at least one heatable elongated cutting blade having a tapering portion, a grooved table, means for moving said plastics sheath over said table in a direction following the longitudinal axis of said cutting blade, said tapering portion of said cutting blade fitting into one of the grooves of said table, and said cutting blade and said table being capable of movement relative to one another along the longitudinal axis of said cutting blade so as to vary the length of blade in contact with said sheath.
Claim 2
Dependent Claim
113 words
Apparatus for cutting and welding a continuously-fed sheath made of thermoplastics material to divide said sheath into a plurality of segments of lesser width, said apparatus including at least one heatable elongated cutting blade having a tapering portion, a grooved table, means for moving said plastics sheath over said table in a direction following the longitudinal axis of said cutting blade, said tapering portion of said cutting blade fitting into one of the grooves of said table, and said cutting blade and said table being capable of movement relative to one another along the longitudinal axis of said cutting blade so as to vary the length of blade in contact with said sheath.
Claim 3
Dependent Claim
50 words
Apparatus according to claim 1, wherein said at least one cutting blade is curved and is adjustable in position, and wherein said cutting table has a curved surface and is arranged to pivot about a point, the curvature of said table surface substantially matching the curvature of said cutting blade.
Claim 4
Dependent Claim
24 words
Apparatus according to claim 2, wherein said blade is suspended by position-adjusting means in a plane perpendicular to the surface of said pivotable table.
Claim 5
Dependent Claim
63 words
Apparatus according to claim 3, wherein said cutting blade is hinged by means of insulating members to at least two clevises which have internally threaded holes in which are engaged the threaded parts of rods which are mounted to rotate in a support bar mounted to slide in a transverse direction on rods the ends of which are fastened to a supporting framework.
Claim 6
Dependent Claim
24 words
Apparatus according to claim 1, wherein said cutting blade is provided with heating means enabling said blade to be heated to a constant temperature.
Claim 7
Dependent Claim
74 words
Apparatus according to claim 2, wherein said cutting table is mounted on two side-pieces the ends of which, opposed to said table, are secured to a shaft perpendicular to said cutting blade, and comprising further a reduction drive member for turning said shaft, said shaft being mounted to rotate in bearings which are vertically slidable in guide means and which are operated by means of rams which support said bearings for said rotary shaft.
Claim 8
Dependent Claim
32 words
Apparatus according to claim 1, wherein said cutting blade is straight and said table has a flat surface and is movable in a straight line following the axis of said cutting blade.
Claim 9
Dependent Claim
24 words
Apparatus according to claim 1, wherein said cutting table is fixed and said knife is movable in a direction which follows its longitudinal axis.
Claim 10
Dependent Claim
28 words
Apparatus according to claim 1, wherein said cutting blade is provided with heating means arranged to heat the leading and trailing edges of said blade to different temperatures.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |