Abstract: A double-sided differentially adhesive adhesive tape is applied to the winding core of a web processing machine, e.g. for producing light-sensitive photographic film, by a dispensing unit carried on a linearly movable support. In the unit, first and second tape applicator rollers are mounted for rotation on the support for engagement upon movement of the support to operative position with the core periphery at peripherally spaced apart points thereon, Tape extends from a supply roll to the first and then to the second roller for application of a winding thereof to the core upon rotation of the latter. The second roller is mounted on the support for limited independent movement after application of the tape winding to a position separated from the core and from the tape, such movement being in a direction generally tangential of the core periphery to avoid lifting the tape from the core.

Abstract: A carriage, preferably carrying a knife for cutting a moving web for attachment of the cut web end to a web winding roll, is driven on a supporting rail along a linear path by means of a driving motor operating a toothed driving belt. The belt is detachably clamped to the carriage by a clamp fixed on the carriage and formed by a support plate having a belt supporting surface thereon and a pressure plate provided with teeth for mating engagement with the belt teeth mounted on the support plate in opposed relation to the support plate surface to define with the surface a slot for reception of the belt. The pressure plate is slidably supported for movement toward and away from the surface and is spring-biased to normally clamp the belt therebetween.