Motion control system for printing machines
AssigneeXerox Corporation
InventorDonald M. Temple
Life of this patent
Estimating the term…
Abstract
The present invention is a method and apparatus for regulating the velocity of a member constrained to move about a predefined path. The invention comprises a magnetic patch or strip, located on a surface of the member, and having a plurality of magnetic signals recorded thereon, along with a magnetic detector, positioned in proximity to said magnetic strip, for sensing the magnetic signals recorded thereon, during movement of the member, and producing an output signal in response to the magnetic signals. The invention further comprises means, operatively connected to impart a driving force to the member, and control means for regulating said driving means so that the member is driven at a velocity which is a function of the output signal.
Claims16
An apparatus for regulating the velocity of a belt moving in a recirculating path, comprising:
- a magnetic strip, located on a surface of the belt, having a plurality of magnetic signals recorded thereon, wherein the magnetic signals are prerecorded on said magnetic strip in a predetermined varying fashion;
- a magnetic detector, positioned in proximity to said magnetic strip, for sensing the magnetic signals recorded thereon, during movement of the belt, and producing an output signal in response to the magnetic signals;
- means for driving the belt;
- and
- control means, responsive to the output signal, for regulating said driving means so as to produce a varying frequency output signal when the belt is driven at a constant velocity.
A printing machine for producing copies of an original document, comprising:
- a movable charge retentive member;
- a magnetic recording strip on a surface of said charge retentive member, said magnetic recording strip having a plurality of magnetic signals recorded thereon;
- processing means for generating and developing a latent image on said charge retentive member and transferring the developed image from said charge retentive member to a copy sheet;
- means for controlling the operation of said processing means in response to the signals recorded on said magnetic recording strip;
- and
- means, responsive to the signals recorded on the magnetic recording strip, for regulating the velocity of said charge retentive member.
An apparatus for regulating the velocity of a belt moving in a recirculating path, comprising:
- a magnetic strip, located on a surface of the belt, having a plurality of magnetic signals recorded thereon, wherein the magnetic signals have a varying signal period;
- a magnetic detector, positioned in proximity to said magnetic strip, for sensing the magnetic signals recorded thereon, during movement of the belt, and producing an output signal in response to the magnetic signals;
- means for driving the belt;
- and
- control means, responsive to the output signal, for regulating said driving means so that the belt is driven at a varying velocity which is a function of the output signal.
Dependencies are inferred from the claim text.