Conveyors: power-driven – Conveyor section – Endless conveyor
Reexamination Certificate
2006-04-18
2008-09-02
Crawford, Gene O. (Department: 3651)
Conveyors: power-driven
Conveyor section
Endless conveyor
C198S850000, C198S851000, C198S852000
Reexamination Certificate
active
07419052
ABSTRACT:
Conveyor chains are provided which comprise free balls which are free to rotate in all directions thereby allowing for the stable conveyance of articles in any direction in the entire horizontal plane and at an increased speed in the direction of conveyance with reduced contamination in the conveyance environment. A conveyor chain100comprises a number of chain links110comprising a plurality of hinge portions112in a zigzag formation protruding from the front and rear end edges that are connected to each other in the longitudinal direction of the chain through hinge pins120. Free balls131protrude from both the surface and back sides of the chain link110and are free to rotate while held in the chain link110. Either the free balls131or ball holding portions132, which hold the free balls131, is made of polyacetal while the other is made of polyamide or polyester.
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Murakami Yoshihiro
Ozaki Hajime
Shibayama Katsutoshi
Dann Dorfman Herrell and Skillman, P.C.
Skillman Henry H.
Tsubakimoto Chain Co.
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