Abstract: A tool for attaching a flexible hinge member to the edge of at least one finished end of a wall panel. The tool includes at least one guide member and a first roller assembly carried on the guide member. The first roller assembly includes a first roller having at least one annular groove formed therein. A second roller assembly is carried on the guide member and is spaced from the first roller assembly. The second roller assembly includes a second roller.

Abstract: A single facer machine for making a corrugated web is provided with a vacuum means for retaining a corrugated medium on one of the corrugating rolls. Said one corrugating roll has a core through which a heated fluid may flow. The core is surrounded by a sleeve which contains peripheral longitudinally extending flutes and valleys meshed with corresponding flutes and valleys on the other corrugating roll. A suction housing is juxtaposed to the outer periphery of said sleeve.

Abstract: Disclosed is a new and improved apparatus for aligning and bonding a pre-perforated flexible repair tape to the side edge portion of an elongated strip, such as motion picture film, having damaged sprocket feed hole perforations located therealong. Film to be repaired is fed continuously from a supply reel to a repair station comprising a grooved pressure roller cooperating with a sprocket roller specifically designed to more precisely align the preformed feed holes of the tape with the damaged feed hole locations of the film, and to bond the tape and film together in the aligned condition, the laminated tape and film thereafter being directed over an exit ramp to a storage reel for collection.

Abstract: A printer-plotter system includes a vacuum-buffered bidirectional paper drive system for moving paper uniformly forward and backward over a sprocketed platen and sprocketed drum. The platen comprises a stationary portion with a flat region and a rotatable sprocketed portion. The platen and drum are connected by a drive belt for synchronous rotation of the drum with the sprocketed portion of the platen to assure proper contact of a print head with the flat region of the stationary portion and proper movement of paper by the sprocketed portion after printing.

Abstract: A drive roller and cooperating idler rollers of the friction type are combined to transport or to advance paper or like record media wherein the idler rollers are driven slightly faster than the drive roller. The drive roller has slots or voids in the periphery thereof aligned with the path of travel of the idler rollers to permit an easing or relaxing of the idler roll pressure on the paper and thereby enable the canceling of any accumulated difference in the drive motion between the drive roller and the idler rollers.

Abstract: A sprocket assembly for a motion picture projector and a method of threading and removing film from the sprocket assembly is disclosed. By selected configuration of the sprocket and the stationary sprocket guard, including aligner and keeper portions cooperating with the teeth of the sprocket, the film is inserted and removed by simply bending and lowering or twisting and lifting relative to the sprocket assembly.