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US 6,715,387 B2Granted
Producing method of film with through-holes
AssigneePENTAX Corporation
InventorMinoru Suzuki
Life of this patent
Estimating the term…
Abstract
A film is made of an elastic material. The film is stretched in at least one direction in parallel to a surface of the film. Then, through-holes are punched in the film be means of needles, in a state the film is stretched. After the punching is completed, the stretching is terminated, so that the film recovers its original shape.
Claims6
A producing method of a film with through-holes, said film being made of shape memory resin, said method comprising the steps of:
- forming through-holes in said film such that said through-holes are inclined;
- heating said film to a temperature above a shape-providing temperature of said shape memory resin;
- and
- stretching said film in at least one direction in parallel to a surface of said film, in a state said film is heated to a temperature above said shape-providing temperature.
1 more element
Dependencies are inferred from the claim text.