CA621391A - Method and apparatus for perforating thermoplastic films - Google Patents

Method and apparatus for perforating thermoplastic films

Info

Publication number
CA621391A
CA621391A CA621391A CA621391DA CA621391A CA 621391 A CA621391 A CA 621391A CA 621391 A CA621391 A CA 621391A CA 621391D A CA621391D A CA 621391DA CA 621391 A CA621391 A CA 621391A
Authority
CA
Canada
Prior art keywords
thermoplastic films
perforating thermoplastic
perforating
films
thermoplastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA621391A
Inventor
D. Kiplinger Harold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wingfoot Corp
Original Assignee
Wingfoot Corp
Publication date
Application granted granted Critical
Publication of CA621391A publication Critical patent/CA621391A/en
Expired legal-status Critical Current

Links

CA621391A Method and apparatus for perforating thermoplastic films Expired CA621391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA621391T

Publications (1)

Publication Number Publication Date
CA621391A true CA621391A (en) 1961-06-06

Family

ID=35876580

Family Applications (1)

Application Number Title Priority Date Filing Date
CA621391A Expired CA621391A (en) Method and apparatus for perforating thermoplastic films

Country Status (1)

Country Link
CA (1) CA621391A (en)

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