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US4755120A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus for the production of upholstery with back-foamed covers

Assignee: FRITSCHE-HOLLMANN & Co KG LOTTE GERMANY A CORP OF GERMANY GmbH
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Filing: 1987-09-24
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Granted: 1988-07-05
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Expires: 2007-09-24
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Abstract

Abstract The present invention is directed to an apparatus for the production of back-foamed covers from cover materials and foam comprising (i) a mold comprising an upper mold half and a lower mold half, the lower mold half having a cavity therein, the inside surface of which is capable of being covered by the cover material, (ii) a mixhead associated with the mold, the mixhead capable of introducing foam materials and/or reactants into the mold cavity, (iii) a pusher bar arranged on a mount for pushing the cover material into the mold cavity and being arranged above the lower mold half, the pusher bar being constructed such that when the bar is pushing the cover material into the mold cavity, a gap is formed between the edge of the mold cavity and the edge of the pusher bar, the gap being less than the thickness of the cover material, (iv) the lower mold half being movable towards and/or away from the pusher bar, and (v) the surface of the pusher bar facing the mold cavity edge being a frictional surface.

Inventors

  • 👤 Volker Onnenberg
  • 👤 Gunter Mollmann

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 12:09
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C44/00; B29C44/02; B29C44/12; B29C44/14; B29C44/146

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 173 words
An apparatus for the production of back-foamed covers from cover materials and foam comprising (i) a mold comprising an upper mold half and a lower mold half, said lower mold half having a cavity therein, the inside surface of which is capable of being covered by said cover material, (ii) a mixhead associated with said mold, said mixhead capable of introducing foam materials and/or reactants into said mold cavity, (iii) a pusher bar arranged on a mount for pushing said cover material into said mold cavity and being arranged above said lower mold half, said pusher bar being constructed such that when said bar is pushing said cover material into said mold cavity, a gap is formed between the edge of the mold cavity and the edge of the pusher bar, said gap being less than the thickness of said cover material, (iv) said lower mold half being movable towards and/or away from said pusher bar, and (v) the surface of said pusher bar facing said mold cavity edge being a frictional surface.
Claim 2
Independent Claim 173 words
An apparatus for the production of back-foamed covers from cover materials and foam comprising (i) a mold comprising an upper mold half and a lower mold half, said lower mold half having a cavity therein, the inside surface of which is capable of being covered by said cover material, (ii) a mixhead associated with said mold, said mixhead capable of introducing foam materials and/or reactants into said mold cavity, (iii) a pusher bar arranged on a mount for pushing said cover material into said mold cavity and being arranged above said lower mold half, said pusher bar being constructed such that when said bar is pushing said cover material into said mold cavity, a gap is formed between the edge of the mold cavity and the edge of the pusher bar, said gap being less than the thickness of said cover material, (iv) said lower mold half being movable towards and/or away from said pusher bar, and (v) the surface of said pusher bar facing said mold cavity edge being a frictional surface.
Claim 3
Dependent Claim 15 words
The apparatus of claim 1, characterized in that the frictional surface consists of a roughening.
Claim 4
Dependent Claim 15 words
The apparatus of claim 1, characterized in that the frictional surface consists of an elastomer
Claim 5
Dependent Claim 14 words
The apparatus of claim 1, characterized in that the pusher bar is spring mounted.
Claim 6
Dependent Claim 26 words
The apparatus of claim 1, characterized in that the pusher bar is arranged to be removable from the range of vertical projection of the mold cavity.
Claim 7
Dependent Claim 21 words
The apparatus of claim 1, characterized in that the pusher bar is arranged on a mount designed as a supporting frame.
Claim 8
Dependent Claim 15 words
The apparatus of claim 1, characterized in that the mount consists of an upper ram.

References Cited (Backward Citations)

US3172927A Cited
US3531555A Cited
US3260781A Cited
US3686051A Cited
US4107829A Cited
DE2746686A1 Cited
US4378265A Cited
US4464329A Cited
US4692199A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-07-05 1992-01-04 1992-07-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-07-05 1996-01-04 1996-07-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-07-05 2000-01-04 2000-07-05 $7700.00 Window Closed / Lapsed

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