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US 4,564,407 AGranted
Manufacturing method and manufacturing equipment for plastic air cell cushioning material
AssigneeOrihiro Co., Ltd.
InventorOrihiro Tsuruta
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Abstract
A manufacturing method for a cushioning material of air-filled film, wherein a plastic film sheet formed into a cylindrical shape is transversely fusion-bonded so that small air-filled cells are fabricated continuously. Manufacturing equipment is provided with a means for forming a plastic film into a cylindrical shape, a longitudinal sealing means, a roller means, and a transverse sealing means.
Claims2
A method for manufacturing cushioning material consisting of air-filled plastic cells, which comprises the following sequential steps:
- (a) forming a single sheet of plastic film into a cylindrical shape;
- (b) fusion bonding said cylindrical shape along the entire longitudinal edges thereof to form a cylindrical body;
- (c) advancing downwardly said cylindrical body while concurrently fusion bonding the leading end of said body transversely to the downward direction of movement of said body;
- (d) introducing air into the open end of said cylindrical body;
- (e) intermittently restricting the expansion of said cylindrical body with at least one pair of forming plates transversely to the direction of movement of the body;
- (f) fusion bonding said cylindrical body at predetermined distances from said fusion bonded lead end to form individual, air filed cells in a sequential manner.
3 more elements
Dependencies are inferred from the claim text.