Claims
- 1. A chair back, comprising:a plastic shell having a top, bottom, and first and second sides, said top having an edge configured in a first shape; at least one curved internal rib defined in said plastic shell adjacent said top, said internal rib extending from said first side to said top and on to said second side of said plastic shell, said internal rib configured in a second shape different from said first shape of said edge wherein said plastic shell can be cut between said edge and said internal rib to a shape corresponding to said internal rib; and an outer shell adapted to be attached to a back side of said plastic shell.
- 2. The chair back of claim 1 wherein said shell has a front and a back side and said internal rib has a staple strip on said back side of said shell.
- 3. The chair back of claim 2 wherein said internal rib further includes a plurality of transverse strips defining pockets along said internal rib on said front side of said shell, said strips substantially preventing cushioning from entering into said pockets.
- 4. The chair back of claim 2 wherein said edge defines a pair of corners, and said back side of said shell defines a pair of indentations, each said indentation defined adjacent each said corner, said indentations having a depth sufficient to receive twice as many layers of fabric as the rest of said back side.
- 5. The chair back of claim 2 wherein said front side of said shell has a solid skin defined over a majority of said front side, said skin allowing foam to be attached thereto with an adhesive.
- 6. The chair back of claim 1 wherein said shell has a front and a back side, said back side defining a surface having a two dimensional curved shape.
- 7. The chair back of claim 6 wherein one of said outer shell and said plastic shell defines a recess, the other of said outer shell and said plastic shell has a lug adapted to insert into said recess for securing said outer shell to the back side of said shell.
- 8. The chair back of claim 1 wherein said shell has a thickness which generally increases from said top toward said bottom of said shell.
- 9. The chair back of claim 1 further including a second, curved internal rib defined in said plastic shell, said second internal rib extending from said first side to said top and to said second side of said plastic shell, said second internal rib configured in a third shape different from both said second shape of said internal rib and first shape of said edge wherein said plastic shell can be cut along said second rib to yield a plastic shell having said third shape.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a division of U.S. application Ser. No. 08/953,474 filed Oct. 17, 1997, and issued as U.S. Pat. No. 5,951,110 on Sep. 14, 1999, of John P. Conner, et al. entitled CONTOURED PLASTIC SEAT BACK.
US Referenced Citations (59)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2723722 |
Jul 1978 |
DE |
Non-Patent Literature Citations (1)
Entry |
Exhibit A is a History of Movie Theatre Seating Product Development, 1 page; all seats depicted herein include plywood internal structure and are prior art. |