Chairs and seats – Bottom – back and leg
Patent
1973-04-30
1977-08-09
Caun, Peter M.
Chairs and seats
Bottom, back and leg
A47C 512
Patent
active
040406628
ABSTRACT:
A seating unit comprising supporting structure such as legs or a pedestal and seat only, or supporting structure and seat and back and connecting members, the latter of which may be shaped as arms. The entire structure preferably is formed of a single sheet of bendable or foldable material such as sheet metal. All surfaces of the seating unit are of the types of those ruled surfaces which are developable. Such surfaces are either: (a) plane; or (b) single-curved surfaces, namely cylindrical, conical and convolute; or (c) combinations of (a) and (b). The entire structure is characterized by the absence of any surfaces which are nondevelopable, whereby starting with a flat bendable or foldable sheet of material a seating unit having a seat and supporting structure may be integrally formed without stretching, crumpling, or tearing the sheet. The thus formed structure will receive surface treatment material in sheet form which will lie thereon in mutual conformity therewith likewise without stretching, crumpling or tearing.
REFERENCES:
patent: 2439690 (1948-04-01), Lippenberger
patent: 2936826 (1960-05-01), Reineman
patent: 3459449 (1969-08-01), Klausen
patent: 3512835 (1970-05-01), Flototto
patent: 3561818 (1971-02-01), Lohmeyer
patent: 3746394 (1973-07-01), Speidel
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