PIERCING THIN SHEET MATERIAL

A method and apparatus for piercing thin sheet material, such as plastic film, is provided wherein the sheet material is passed between a piercing member having a plurality of independently resilient protrusions extending therefrom and a backing member having a retiform exterior surface, said pierci...

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Bibliographic Details
Main Authors DAVID GUERNSEY CLASH, THEODORE FREDRICK KOZAK
Format Patent
LanguageEnglish
Published 26.04.1974
Subjects
BABY LINEN
BANDAGES, DRESSINGS OR ABSORBENT PADS
CUTTING
CUTTING-OUT
DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS
FILTERS IMPLANTABLE INTO BLOOD VESSELS
FIRST-AID KITS
FOMENTATION
HAND CUTTING TOOLS
HANDKERCHIEFS
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES
PERFORATING
PERFORMING OPERATIONS
PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE
PROSTHESES
PUNCHING
SEVERING
SEVERING BY MEANS OTHER THAN CUTTING
SHIRTS
STAMPING-OUT
TRANSPORTING
TREATMENT OR PROTECTION OF EYES OR EARS
UNDERWEAR
WEARING APPAREL
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Summary:A method and apparatus for piercing thin sheet material, such as plastic film, is provided wherein the sheet material is passed between a piercing member having a plurality of independently resilient protrusions extending therefrom and a backing member having a retiform exterior surface, said piercing member or said backup member being moved relative to the other member, thereby causing said resilient protrusions to follow said retiform surface and selectively pierce said film.
Bibliography:Application Number: AU19720047917