Advancing material of indeterminate length – Processes – Involving registration of material
Patent
1975-08-05
1976-08-31
Saifer, Robert W.
Advancing material of indeterminate length
Processes
Involving registration of material
226 33, 226143, B65H 1744
Patent
active
039775860
ABSTRACT:
In a method for precisely advancing a printed packaging strip provided with markings at uniformly spaced distances and which is to be cut into length portions corresponding to such distances, a sensor head being provided along the feed path of the strip to produce an indication, each time a marking reaches a predetermined location, the strip being advanced during successive operating cycles, with each cycle corresponding to the cutting of a successive length portion of the strip, precise strip advance is effected by, during each operating cycle: advancing the strip first through a predetermined distance which reliably differs from the distance between successive markings; subsequently imparting to the strip, by movement of a carrying device, a correcting movement over a distance and in a direction which brings a marking to such predetermined location and causes the sensor head to produce such indication; causing the indication produced by the sensor head to actuate a clamping mechanism to cause that mechanism to firmly clamp the strip in a manner to prevent further advance of the strip; and continuing the movement of the carrying device until it reaches a predetermined point of movement direction reversal.
REFERENCES:
patent: 3021988 (1962-02-01), Focht
patent: 3371834 (1968-03-01), Willits et al.
patent: 3446499 (1969-05-01), Ringler
Saifer Robert W.
SIG - Schweizerische Industrie-Gesellschaft
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