3808394 is referenced by 34 patents and cites 13 patents.

A small hole may be located in a wall of a flexible member or structures such as a tube of a thermoplastic material and, if desired, in an internal wall within such a tube by contacting such a wall or walls with a laser beam serving to heat the area or areas where such a hole or holes are to be created for a time sufficient to enable such a beam to heat the material contacted to create such a hole or holes. Preferably the tube is held against a surface of a moving member as the beam is directed so as to engage only a single point on the surface of the tube.

Title
Creating holes in flexible members
Application Number
05/239,921
Publication Number
3808394
Application Date
March 31, 1972
Publication Date
April 30, 1974
Inventor
Vance Gilbert W
Mominee David E
Assignee
Anjac Plastics
IPC
B23k 27/00
B23K 26/08
E02B 13/00
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