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Speed matching system for a web splicer mechanism in a web-fed printing press or the like

  • US 6,695,027 B2
  • Filed: 11/28/2001
  • Issued: 02/24/2004
  • Est. Priority Date: 12/14/2000
  • Status: Expired due to Fees
First Claim
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1. In an apparatus for splicing a web of paper like-material, which is traveling at any given speed along a predefined path by being unwound from a first web roll, to a second web roll of a variable diameter being rotated in a splicing position in which the second web roll of any diameter is spaced a prescribed constant distance from the web traveling along the predefined path, a speed matching system for matching the peripheral speed of the second web roll to the running speed of the web traveling along the predefined path preparatory to the splicing of the webs, the speed matching system comprising:

  • (a) a first speed sensor for sensing the running speed of the web traveling along the predefined path by being unwound from the first web roll;

    (b) web roll drive means for driving the second web roll in the splicing position;

    (c) a second speed sensor for photoelectrically sensing the peripheral speed of the second web roll being driven in the splicing position;

    (d) sensor positioning means for adjustably moving the second speed sensor along two orthogonal axes to an optimum sensing position with respect to the second web roll being held in the splicing position, no matter how large the second web roll may be in diameter; and

    (e) an electric control circuit having inputs connected to the first and the second speed sensor and an output connected to the web roll drive means for causing the web roll drive means to be controllably energized according to a departure of the peripheral speed of the second web roll in rotation in the splicing position from the running speed of the web traveling along the predefined path.

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