Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material
Patent
1982-02-03
1983-08-30
Christian, Leonard D.
Advancing material of indeterminate length
With material-responsive control means
To regulate longitudinal movement of material
226 35, 226154, B65H 2318, B65H 1722
Patent
active
044012500
ABSTRACT:
In the intermittent forward feeding of a material web provided with transverse crease lines and simultaneous punching of holes into the material web in a definite relation to the crease line pattern, it is important to ensure that any faults in the length of the forward feed, do not accumulate during working over longer periods. Such faults, which occur due to unavoidable inaccuracies would lead successively to ever increasing faultiness in the placing of the holes. A method and an arrangement adapted to avoid the accumulation of such faults are provided.
In the method the material web during each forward feeding is advanced a distance which exceeds the correct distance between two transverse lines by the fault margin. Subsequently, before the next forward feeding, the web is restored to a correct position, not affected by any faults in the distance between the crease lines.
An arrangement for the carrying out of the method has, beside a driving element in the form of a driven roller situated in contact with the material web, also a register-holding element. The register holding element includes drivers, which engage with the transverse crease lines, and which after each forward feeding, with simultaneous disengagement of the driving element, restores the web a certain distance so as to place the crease lines into the correct position.
REFERENCES:
patent: 3204842 (1965-09-01), Reimann
patent: 3640439 (1972-02-01), Selke
patent: 4008839 (1977-02-01), Yamashita
patent: 4153190 (1979-05-01), Marion
patent: 4217163 (1980-08-01), Utzmann et al.
Christian Leonard D.
Tetra Pak International AB
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