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US 4,662,734 AGranted
Bellows
AssigneeKabushiki Kaisha Sakai Tokushu Camera Seisakusho
InventorMasahiro Nishi
Life of this patent
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Abstract
A bellows including a flexible tubular body of a sheet, which is bent in alternate directions along the length thereof on circumferential folds for extensibility, and reinforcements, printed on one surface of the sheet between adjacent circumferential folds.
Claims12
A bellows comprising:
- a flexible tubular body of a sheet which is bent in alternate directions along the length therefore on circumferential folds for extensibility and retractibility and
- reinforcements printed on a surface of the body in a predetermined pattern between adjacent circumferential folds to increase the strength of the bellows, said reinforcements comprising an ink material which will harden subsequent to being printed, wherein said ink foams when heated.
A bellows comprising:
- a flexible tubular body of a sheet which is bent in alternate directions along the length therefore on circumferential folds for extensibility and retractility and
- reinforcements provided on a surface of the body between adjacent circumferential folds to increase the strength of the bellows, said reinforcements comprising a heat-foamable ink material in a predetermined pattern printed on the surface of the body.
Dependencies are inferred from the claim text.