Rotary perforating apparatus
AssigneeAgfa-Gevaert
InventorWilfried Edgard Muylle
Life of this patent
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Abstract
A rotary perforating apparatus for forming the guide perforations in photographic film, wherein the mechanism which controls the movements of the punch carrier arms comprises a control disc which rotates eccentrically with respect to a film-supporting wheel, and wherein the punch carrier arms are connected to said control disc through control arms which may perform a spacial swinging movement, thereby to provide a mechanism which is little subject to wear, and wherein standard ball bearings and ball joints may be used.
Claims7
Rotary perforating apparatus for perforating an advancing web, comprising a frame, a rotatable web-supporting wheel mounted on said frame for supporting a section of the web during its advance, a plurality of web punch assemblies, each including a punch carrier arm pivoted in a radial plane of the wheel, a punch on said arm, and a die for receiving said punch, arranged in spaced side-by-side relation in series around the periphery of said wheel, said means operative during rotation of said wheel to pivot the punch carrier arms of the successive perforator assemblies towards the web-supporting wheel to perforate successive sections of the web supported on said wheel, said means comprising a control member mounted on said frame for rotation with and at the same angular speed as the web-supporting wheel, and a control arm for each web punch assembly, each control arm being pivotally connected at one end to said control member and at the opposite end to the corresponding punch carrier arm, the points of pivotal connection of said control arms to said control member being arranged in a circle which is eccentric with respect to the axis of rotation of said web-supporting wheel.
Dependencies are inferred from the claim text.