US3245294A
Expired / Lapsed
US
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Means for and method of cutting thermoplastic materials
Assignee: GM Pfaff AG
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Filing: 1964-10-20
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Granted: 1966-04-12
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Expires: 1984-10-20
Abstract
No abstract record available.
Inventors
- 👤 Butter Otto
- 👤 Siewerth Gerhard
- 👤 Frohlich Helmut
- 👤 Hafner Klaus
- 👤 Damaschek Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:43
CPC Classifications
B; B26; B26F; B26F3/00; B26F3/06; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/041; Y10T83/0414; Y10T83/242; Y10T83/283; Y10T83/293
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A DEVICE FOR CUTTING THEREMOPLASTIC WORKPIECES COMPRISING IN COMBINATION: (1) A THERMAL CUTTER OF HIGH ELECTRICAL RESISTIVITY, (2) CURRENT SUPPLY MEANS ENERGIZING SAID CUTTER, TO RAISE THE SAME TO AN OPERATING TEMPERATURE WITHIN THE SOFTENING RANGE OF THE THERMOPLASTIC MATERIAL TO BE CUT, (3) CURRENT CONTROL MEANS EFFECTIVE UPON ACTUATION TO RAISE SAID OPERATING TEMPERATURE TO A POINT IN EXCESS OF THE DECOMPOSITION TEMPERATURE OF SAID MATERIAL, (4) FIRST TIME-DELAY CONTROL MEANS RESPONSIVE TO THE ACTUATION OF SIAD CURRENT CONTROL MEANS AND EFFECTIVE, AFTER LAPSE OF A PREDETERMINED TIME INTERVAL, TO DISCONNECT SAID CURRENT SUPPLY MEANS FROM AND TO ALLOW OF COOLING OF SAID CUTTER, AND (5) SECOND TIME-DELAY CONTROL MEANS ALSO RESPONSIVE TO THE ACTUATION OF SAID CONTROL MEANS AND HAVING A GREATER DELAY TIME THAN SAID FIRST TIME-DELAY MEANS, TO RELEASE SAID CURRENT CONTROL MEANS, AND TO RECONNECT SAID CURRENT SUPPLY MEANS TO SAID CUTTER.
Claim 2
Independent Claim
147 words
A DEVICE FOR CUTTING THEREMOPLASTIC WORKPIECES COMPRISING IN COMBINATION: (1) A THERMAL CUTTER OF HIGH ELECTRICAL RESISTIVITY, (2) CURRENT SUPPLY MEANS ENERGIZING SAID CUTTER, TO RAISE THE SAME TO AN OPERATING TEMPERATURE WITHIN THE SOFTENING RANGE OF THE THERMOPLASTIC MATERIAL TO BE CUT, (3) CURRENT CONTROL MEANS EFFECTIVE UPON ACTUATION TO RAISE SAID OPERATING TEMPERATURE TO A POINT IN EXCESS OF THE DECOMPOSITION TEMPERATURE OF SAID MATERIAL, (4) FIRST TIME-DELAY CONTROL MEANS RESPONSIVE TO THE ACTUATION OF SIAD CURRENT CONTROL MEANS AND EFFECTIVE, AFTER LAPSE OF A PREDETERMINED TIME INTERVAL, TO DISCONNECT SAID CURRENT SUPPLY MEANS FROM AND TO ALLOW OF COOLING OF SAID CUTTER, AND (5) SECOND TIME-DELAY CONTROL MEANS ALSO RESPONSIVE TO THE ACTUATION OF SAID CONTROL MEANS AND HAVING A GREATER DELAY TIME THAN SAID FIRST TIME-DELAY MEANS, TO RELEASE SAID CURRENT CONTROL MEANS, AND TO RECONNECT SAID CURRENT SUPPLY MEANS TO SAID CUTTER.
References Cited (Backward Citations)
US1810987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |