US3769124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for splicing foam sheet material
Assignee: Mobil Oil AS
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Filing: 1972-03-21
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Granted: 1973-10-30
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Expires: 1992-03-21
Abstract
Abstract A method and apparatus for automatically splicing foam sheet material, such as thermoplastic polystyrene foam, for example, utilizing a butt-welding technique. The apparatus comprises a moving hot wire which severs and simultaneously heat softens the leading edge of a new foam stock roll; and subsequently severs and heat softens the trailing end of a used roll, prior to bringing the heat softened ends of the rolls together, thereby forming a butt-weld.
Inventors
- 👤 D Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:34
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/40; B29C66/41; B29C66/43; B29C53/00; B29C53/32; B29C65/00; B29C65/02; B29C65/18; B29C65/20; B29C65/2007; B29C65/2038; B29C65/2046; B29C65/2053; B29C65/2061; B29C65/2069; B29C65/2076; B29C65/22; B29C65/221; B29C65/222; B29C65/78; B29C65/7802; B29C65/7841; B29C65/7847; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/114; B29C66/1142; B29C66/70; B29C66/72; B29C66/727; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C66/83221; B29C66/84; B29C66/853; B65; B65H; B65H19/00; B65H19/10; B65H19/18; B65H19/1842; B65H19/1852; B65H19/1857; B65H19/1868; B29C2793/00; B29C66/71; B29C66/82; B29C66/822; B29C66/8221; B29K; B29K2105/00; B29K2105/04; B65H2301/00; B65H2301/40; B65H2301/46; B65H2301/461; B65H2301/4615; B65H2301/4617; B65H2301/46176; B65H2301/463; B65H2301/4634; B65H2301/464; B65H2301/46412; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1317; Y10T156/1322; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1715
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A method for thermally splicing together the ends of thermoplastic foam sheet stock comprising, sequentially, (a) transversely severing, with a hot element a portion of the leading edge of a first foam sheet; (b) transversely severing, by continued movement of said hot element, a portion of the trailing edge of a second foam sheet; (c) moving said hot element out of contact with said severed edges and subsequently; (d) bringing said heated severed edges into abutting edge to edge relationship to thermally weld the preheated severed edge of said first sheet to the preheated severed edge of said second sheet.
Claim 2
Independent Claim
100 words
A method for thermally splicing together the ends of thermoplastic foam sheet stock comprising, sequentially, (a) transversely severing, with a hot element a portion of the leading edge of a first foam sheet; (b) transversely severing, by continued movement of said hot element, a portion of the trailing edge of a second foam sheet; (c) moving said hot element out of contact with said severed edges and subsequently; (d) bringing said heated severed edges into abutting edge to edge relationship to thermally weld the preheated severed edge of said first sheet to the preheated severed edge of said second sheet.
Claim 3
Independent Claim
107 words
An apparatus for thermally splicing together the ends of thermoplastic foam sheet stock which comprises (a) means for positioning the leading edge of a first foam sheet in a horizontal plane directly above the trailing edge of a second foam sheet; (b) heated means for transversely severing a portion of the leading edge of said first sheet, said heated means subsequently transversely severing a portion of the trailing edge of said second sheet; (c) means for moving the heated edges of said sheets into horizontal Alignment and; (d) means for moving the heated edges of said sheets into abutting relationship to thermally weld said sheet edges together.
Claim 4
Independent Claim
107 words
An apparatus for thermally splicing together the ends of thermoplastic foam sheet stock which comprises (a) means for positioning the leading edge of a first foam sheet in a horizontal plane directly above the trailing edge of a second foam sheet; (b) heated means for transversely severing a portion of the leading edge of said first sheet, said heated means subsequently transversely severing a portion of the trailing edge of said second sheet; (c) means for moving the heated edges of said sheets into horizontal Alignment and; (d) means for moving the heated edges of said sheets into abutting relationship to thermally weld said sheet edges together.
Claim 5
Dependent Claim
29 words
An apparatus in accordance with claim 2 which includes means for preheating the severed edges of said first and second sheets prior to moving said edges into abutting relationship.
References Cited (Backward Citations)
US3227594A
Cited
US3673046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |