Sentence Examples


  • The operator actuates a typewriter form of perforator which punches varying groups of holes, representing the different characters, in a paper strip about one inch wide.
  • The Creed system is a development of the Morse-Wheatstone system, and provides a keyboard perforator which punches Morse letters or figures on a paper strip by depressing type writer keys.
  • The speed of the receiving perforator ranges from 20 to 150 words per minute.
 
 

How would you define perforator? Add your definition here.

comments powered by Disqus