Patent US4637814A successfully refreshed from Google Patents.
US3661684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing a padded article
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1970-07-15
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Granted: 1972-05-09
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Expires: 1990-07-15
Abstract
Abstract The hereinafter specification discloses an apparatus for forming, filling and closing a padded article. The article is provided with a hidden seam and is suitable for use as a cushion, chair seat, chair back, automobile crash pad, or the like. According to the invention, a cover sheet of plastic material is plug formed into a die cavity such that a pocket is created in the sheet. The pocket is filled with a foam padding and a rigid support member. A plastic cap sheet is applied and head sealed to the cover sheet using sliding seal bars to hide the seam and to close the article.
Inventors
- 👤 John Rallis
- 👤 James C Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:22
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C51/00; B29C51/04; B29C51/26; B29C51/30; B29C51/32; B29C51/34; B29C63/00; B29C63/22; B29C65/04; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/13; B29C66/131; B29C66/20; B29C66/24; B29C66/242; B29C66/2424; B29C66/24243; B29C66/24244; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5344; B29C66/5346; B29C66/53461; B29C66/70; B29C66/72; B29C66/727; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C51/10; B29C66/71; B29C70/00; B29C70/68; B29C70/70; B29K; B29K2105/00; B29K2105/04; B29L; B29L2031/00; B29L2031/58; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1034
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
17 words
Electrode means movable into contact with each seal bar to dielectrically seal the heat softened thermoplastic sheet.
Claim 2
Dependent Claim
33 words
The apparatus according to claim 1 wherein each said projecting arm contains a raised edge adapted to contact said electrode to thereby score the two sheets of material to facilitate the trimming thereof.
Claim 3
Dependent Claim
191 words
In an apparatus for covering a flexible, shaped foam article with two sheets of thermoplastic material and for heat sealing the peripheral portions of the two sheets together, comprising a die that describes a cavity having the size and shape of the article and means for gripping the first of the two sheets, for plug forming the first sheet into said die cavity, and for vacuum forming it therein, the improvement wherein the opening of said die cavity is defined by sealing means comprising at least one slidable sealing bar along the side of said cavity defining the opening thereof, adapted to move between a first position wherein said opening of said die cavity is restricted to a dimension that is smaller than that of said cavity and a second position wherein said opening of said cavity is no smaller than that of said cavity, and including a raised edge on said sealing bar adapted to engage the first sheet when it is in contact with the second sheet, and a plunger electrode to contact the two sheets along said raised edge to dielectrically heat seal and to score the sheets.
Claim 4
Independent Claim
101 words
An apparatus for covering a foam supported arm rest with a thermoplastic material and for heat sealing the edges of the material together comprising: A. A die cavity having an opening, sides and a bottom, B. A clamp for supporting a thermoplastic sheet outside of said cavity said clamp spaced from and in proximity to said opening, C. Means for heating the thermoplastic sheet to its heat softened temperature, D. A movable plug former to push the heat softened sheet into the cavity, and E. A vacuum manifold for pulling the softened plug formed sheet into the cavity, the improvement comprising:
Claim 5
Dependent Claim
24 words
The apparatus according to claim 4 further improved by the use of electrically controlleD pistons for concurrently actuating all of the slidable seal bars.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |