US5092208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot knife assembly
Assignee: Davidson Textron Inc
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Filing: 1990-12-07
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Granted: 1992-03-03
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Expires: 2010-12-07
Abstract
Abstract A hot knife assembly for cutting excess organic polymeric material from a thermal forming mold includes a blade-like knife in the form of a thin flat plate having an inner edge connected to a heater and an outer edge with a cutting surface thereon. The thin flat plate has two flat surfaces substantially encapsulated by a refractory wedge. The refractory wedge in formed silicone material and extends coextensive and adjacent the blade-like knife for preventing stringing or re-welding of the cut material.
Inventors
- 👤 Roberto Rosa-Miranda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:44
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/32; B26; B26D; B26D7/00; B26D7/08; B26D7/10; B26F; B26F1/00; B26F1/38; B26F1/40; B26F3/00; B26F3/06; B26F3/08; B29C49/00; B29C49/42; B29C49/48; B29C49/50; Y; Y10; Y10T; Y10T83/00; Y10T83/283; Y10T83/293
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
In a hot knife assembly having a cylindrical tube surrounding a resistance heater for heating the knife the improvement comprising: a thin flat plate having an inner edge, an outer edge and two flat surfaces; a solder bead connecting said inner edge to said cylindrical tube for conducting heat from said cylindrical tube to said thin plate; said outer edge having a cutting surface thereon; a first wedge half of silicone fully covering one of said flat surfaces and a second wedge half of silicone fully covering the other of said flat surfaces; each of said first and second halves culminating in an apex adjacent said cutting surface.
Claim 2
Dependent Claim
108 words
In a hot knife assembly having a cylindrical tube surrounding a resistance heater for heating the knife the improvement comprising: a thin flat plate having an inner edge, an outer edge and two flat surfaces; a solder bead connecting said inner edge to said cylindrical tube for conducting heat from said cylindrical tube to said thin plate; said outer edge having a cutting surface thereon; a first wedge half of silicone fully covering one of said flat surfaces and a second wedge half of silicone fully covering the other of said flat surfaces; each of said first and second halves culminating in an apex adjacent said cutting surface.
References Cited (Backward Citations)
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Cited
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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) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |