US PATENT SUBCLASS 226 / 78
.~.~ Circumferentially opposite pins engage looped material


Current as of: June, 1999
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226 /   HD   ADVANCING MATERIAL OF INDETERMINATE LENGTH

52  DF  MEANS TO ENGAGE LONGITUDINALLY SPACED MODIFICATIONS IN MATERIAL {8}
76  DF  .~ Rotating sprocket (e.g., pin-wheel) {6}
78.~.~ Circumferentially opposite pins engage looped material


DEFINITION

Classification: 226/78

(under subclass 76) Device in which a first portion of material is engaged by one or more first prongs of a sprocket, a second portion of said material is free of [i.e., out of engagement with, and (as disclosed) usually in a loop about, a sound or projection head] said sprocket, and a third portion of said material is engaged by one or more second prongs of the same sprocket, said second prong(s) being peripherally separated (usually, as disclosed, by substantially 180 deg. of arc) from said first prong(s) by prongs which are not in engagement with said second portion of material.

(1) Note. The patents placed herein disclose, and often broadly claim, the named operating station (e.g., a sound head, or a motion picture taking or projecting lens) which station operates on the free loop or bight of the material, and which station the sprocket feeds the material to, and takes the material away.