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US4806088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of expanded cushions with a textile cover
Assignee: Bayer AG
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Filing: 1987-06-24
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Granted: 1989-02-21
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Expires: 2007-06-24
Abstract
Abstract The present invention is directed to an apparatus for the production of foam cushions having a textile cover in which the cover is inserted into a mold cavity and adapted to the contour of the mold cavity by the application of a vacuum wherein movable gates assist in improving the adaptation of the cover to the contour of the mold cavity.
Inventors
- 👤 Ralf Busch
- 👤 Volker Onnenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:17
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/34; B29C44/00; B29C44/02; B29C44/12; B29C44/14; B29C44/146; B29L; B29L2031/00; B29L2031/58; B29L2031/751
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
An apparatus for the production of foam cushions having a textile cover, said apparatus comprising a mold having a fixed floor and walls which define a mold cavity, said apparatus further comprising vacuum means, which are outside said mold and said mold cavity, for applying a vacuum to said mold cavity through holes which extend through said mold and between said mold cavity and said vacuum means, said apparatus having one or more gates which extend into said mold cavity from the fixed floor or walls and means for moving said one or more gates in relation to both the fixed floor and walls of said mold, said apparatus additionally comprising a cover and means for introducing a foamable reaction mixture into said mold cavity.
Claim 2
Independent Claim
125 words
An apparatus for the production of foam cushions having a textile cover, said apparatus comprising a mold having a fixed floor and walls which define a mold cavity, said apparatus further comprising vacuum means, which are outside said mold and said mold cavity, for applying a vacuum to said mold cavity through holes which extend through said mold and between said mold cavity and said vacuum means, said apparatus having one or more gates which extend into said mold cavity from the fixed floor or walls and means for moving said one or more gates in relation to both the fixed floor and walls of said mold, said apparatus additionally comprising a cover and means for introducing a foamable reaction mixture into said mold cavity.
Claim 3
Dependent Claim
19 words
The apparatus of claim 1 which comprises means for moving said one or more gates in a linear manner.
Claim 4
Dependent Claim
26 words
The apparatus of claim 1 wherein said one or more gates are moved through slits arranged in the wall and/or the floor of said form tool.
Claim 5
Dependent Claim
16 words
The apparatus of claim 1 wherein the edges of said one or more gates are contoured.
Claim 6
Dependent Claim
21 words
The apparatus of claim 1 which comprises more than one gate and common gear means for moving all of said gates.
Claim 7
Dependent Claim
28 words
The apparatus of claim 5 which additionally comprises control means for controlling said common gear means such that said gates may be moved together, in groups or individually.
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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |