Arrangement for the reading of photocell markings on a material web provided with decoration

• US 4,081,944 A
• Filed: 12/03/1976
• Issued: 04/04/1978
• Est. Priority Date: 12/19/1975
• Status: Expired due to Term

• Current Assignee: Ab Ziristor
• Original Assignee: Ab Ziristor
• Inventors: Sjostrand, Uno Roland
• Primary Examiner(s): Spruill, Robert Louis
• Application Number:
  US05/747,097
• Time in Patent Office: 487 Days
• Field of Search: 53/51, 226/2, 226/28, 226/29, 226/30
• US Class Current: 53/51
• CPC Class Codes: B65B 41/18 Registering sheets, blanks, or webs
• CPC Class Codes: B65H 23/046 Sensing longitudinal register of web B65H23/18 takes precedence
• CPC Class Codes: B65H 2801/69 Form fill-and-seal machines

Abstract

An apparatus for reading photocell markings applied at equal intervals on the decorated side of a material web run through a packing machine for the continuous manufacture of separatable packages provided with transverse crease lines in which a cylindrical monitoring element which contacts and is rotated by the crease lines functions to periodically actuate an electrical switch which in turn activates a photocell located close to the web when a photocell marking is calculated to pass.

Claims

1. In an apparatus for forming a tube-like member from a longitudinal web of packaging material provided with longitudinally spaced transverse creases and spaced transverse decorations thereon between the transverse creases and providedwith photocell markings between the transverse decorations, in which the tube-like member is filled with a contents and then transversely sealed, shaped and severed into packages in register with the crease lines, the web and filled tube-like member being subject to elongation prior to the sealing, shaping and severing of the filled tube-like member, the improvement of means for controlling the register of the creases of the tube-like member, after filling with contents, with means for sealing, shaping and severing, said controlling means comprising means engagable with the spaced transverse creases on the web prior to formation of the web into the tube-like member and rotatable thereby, switch means responsive to said crease engaging means and operable intermittently thereby, a photocell disposed adjacent the filled tube-like member immediately preceeding the means for sealing, shaping and severing the filled tube-like member and intermittently activated by said switch means when a photocell marking is about to pass said photocell means thereby preventing activation of said photocell means while the spaced transverse decorations are passing said photocell means, said means for sealing, shaping and severing said filled tube-like member being activated when said photocell means reads a photocell marking on said tube-like member whereby elongation of the web and the tube-like member is compensated for.