Shock absorber assembly for reducing breaks in an asphalt-coated

Details Shock absorber assembly for reducing breaks in an asphalt-coated Shock absorber assembly for reducing breaks in an asphalt-coated

1998-12-30

2000-08-29

Walsh, Donald P.

Advancing material of indeterminate length

Plural material-moving means

And intermediate storage

B65H 2030, G11B 1556

Patent

active

061094986

ABSTRACT:
A shock absorber assembly for a finish looper that reduces breaks of a asphalt-coated sheet. The finish looper includes a plurality of looper rolls forming a plurality of free hanging loops of the asphalt-coated sheet. The shocker absorber assembly is mounted on a frame structure capable of relative movement with respect to the looper rolls. The shock absorber assembly includes a plurality of rolls including an indexing roll, a guide roll, and a shock roll positioned between the indexing roll and the guide roll. Just prior to the last free hanging loop being completely payed out, the shock roll is in an up position and the indexing roll is in a down position. When the asphalt-coated sheet is further payed out, the asphalt-coated sheet engages the indexing roll and causes it to pivot from the down position to an up position. The weight and acceleration of the adjacent, upstream free hanging loop causes the shock roll to move from the up position to the down position. The movement of the indexing roll and shock rolls shortens the path length of the asphalt-coated sheet through the shock absorber assembly and reduces the acceleration rate of the sheet in the next loop, thereby reducing breakage of the asphalt-coated sheet when it is payed out from the last free hanging loop. A method of reducing breaks in the asphalt-coated sheet is also described.

REFERENCES:
patent: 1499307 (1924-06-01), Parkes
patent: 1876761 (1932-09-01), Rosener
patent: 4173409 (1979-11-01), Genthe et al.
patent: 4560099 (1985-12-01), Arioli et al.
patent: 5494205 (1996-02-01), Nielsen et al.

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