Measuring and testing – Sheet – woven fabric or fiber
Patent
1978-08-02
1980-01-01
Swisher, S. Clement
Measuring and testing
Sheet, woven fabric or fiber
G01B 520
Patent
active
041810155
ABSTRACT:
Apparatus is disclosed for detecting flaws in sheet material of the character which increase the surface height of the sheet material. The apparatus includes a pair of horizontally parallel driven lower rolls and three upper rolls each mounted on a corresponding pivotal bracket. Two of the upper rolls are associated with one of the lower rolls and are axially spaced apart therealong, and the third upper roll is associated with the other lower roll and positioned therealong to span the space between the other two upper rolls. Each of the upper rolls is rotatably supported by the corresponding bracket for pivotal movement toward and away from the lower roll. Each upper roll bracket is provided with a pair of adjustable stop screws, one adjacent each of the opposite ends of the corresponding upper roll, and each adjustable stop screw carries a switch actuator screw which is adjustable relative to the stop screw. The apparatus frame carries a pair of microswitches for each roll actuated by a corresponding one of the actuator screws through a pivotal switch lever. Each bracket and thus the corresponding upper roll is biased toward the corresponding lower roll, and the spacing between the upper and lower roll is adjusted by the pair of stop screws. An increase in surface height of a sheet passing between the rolls causes the upper roll to be deflected upwardly to actuate one or the other or both of the microswitches.
REFERENCES:
patent: 869324 (1907-10-01), Obert
patent: 1963310 (1934-06-01), Nichols
patent: 2576614 (1951-11-01), Lewellen
patent: 2896196 (1959-07-01), Hartford
patent: 3363458 (1968-01-01), Scharf
patent: 3553668 (1971-01-01), Urmenyi
Jensen James W.
Miller Stanley J.
Gulf & Western Manufacturing Company
Swisher S. Clement
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