Rollers for prestretch film overwrap

Details Rollers for prestretch film overwrap Rollers for prestretch film overwrap

1988-12-22

1993-02-16

Bell, Janyce

Coating processes

Foraminous product produced

Metal base

427245, 427292, 427289, 427314, 427318, 427327, 427358, 4274301, 427435, B05D 500

Patent

active

051869810

ABSTRACT:
A coated roller for transportation and stretching of plastic film web during load unitization, and a process for preparation of the coated roller. A cylindrical metallic roller core is pitted by blasting, then primed, heated and immersed in a room-temperature liquid plastisol comprising vinyl particles dissolved in a plasticizer. The plastisol accumulates on the hot metal to a depth determined by immersion time. After removal, curing and cooling the coated core is machined by lathe to expose a cellular infrastructure and achieve a cylindrical coating coaxial with the core. The coated roller exhibits superior durability, resistance to tackifier additive buildup, and resistance to circumferential web slippage during web stretch between two rollers in a film path from a supply roll to a load being wrapped.

REFERENCES:
patent: 2586887 (1952-02-01), Van Gaver
patent: 2631358 (1953-03-01), Hill
patent: 2753577 (1956-07-01), Van Clief
patent: 3514312 (1970-05-01), Gardiner
patent: 3587153 (1971-06-01), Blickenderfer et al.
patent: 3611028 (1971-10-01), Whitmore
patent: 3786549 (1974-01-01), Pott
patent: 4335857 (1982-06-01), Pfost et al.

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