Stress Tearable Tape
OwnerAn-Hsia LIU, Victor D. LIU +1inventors
InventorsAn-Hsia LIU, Victor D. LIU, Alexander D. LIU
Life of this patent
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Abstract
A stress tearable tape includes an elongated film and a hand tearing arrangement. The film has a non-adhesive surface and an opposed adhesive surface, and defines a longitudinal direction and a transverse direction. The hand tearing arrangement includes a plurality of pinholes formed along the longitudinal direction of the film. With the combination application of internal force, shear tension, compression tension, pinhole arrangement, and material's biaxial structure, and users' habit together, each of the pinholes enables the film being torn by hand with a force starting at one of the pinholes, such that the film is hand tearable at any section in the transverse direction thereof.
Claims48
A stress tearable tape, comprising:
- an elongated film having a non-adhesive surface and an opposed adhesive surface, and defining a longitudinal direction and a transverse direction;
- and
- a hand tearing arrangement which comprises a plurality of pinholes closely formed along said longitudinal direction of said film, wherein each of said pinholes enables said film being torn by hand with a force starting at one of said pinholes, such that said film is hand tearable in said transverse direction thereof.
A method for manufacturing a stress tearable tape, comprising the steps of:
- (a) forming an elongated film to have a non-adhesive surface and an opposed adhesive surface;
- and
- (b) closely forming a plurality of pinholes along a longitudinal direction of said film, wherein each of said pinholes enables said film being torn by hand with a force starting at one of said pinholes, such that said film is hand tearable in a transverse direction thereof.
A machine for manufacturing a stress tearable tape, comprising:
- a puncture rotary base die;
- a puncture rotary die assembly which comprises at least a puncture rotary die rotatably engaged with said puncture rotary base die to define a gap therebetween for feeding a film material therethrough, wherein when said puncture rotary die is rotated for pressing on a non-adhesive surface of the film material and when said puncture rotary base die is rotated for pressing on an adhesive surface of the film material, said puncture rotary die punctures a plurality of pinholes on the film material along a longitudinal direction thereof;
- and
- a cutter unit for cutting the film material into a plurality of elongated films, wherein each of said pinholes enables said film being torn by hand with a force starting at one of said pinholes, such that said film is hand tearable in said transverse direction thereof.
Dependencies are inferred from the claim text.