Abstract A development system comprising a modular developer unit engageable with an image bearing surface for development of the image and disengageable therefrom during other portions of the operation cycle. The modular developer unit contains within the housing structure thereof, developer feed and doctoring structure for presenting appropriate quantities of developer material to an applicator surface also contained in the housing structure but protruding from an opening therein. The developer system further comprises a cam arrangement and synchronizing structure for timely movement of the applicator surface into and out of contact with the image surface in accordance with a predetermined sequence of operation.
In a copying machine: an imaging surface; means for producing an image on said surface; means for applying developer material to said surface; a cam structure and positive drive therefor for effecting disengagement of said developer applying means from said imaging surface and subsequent engagement therewith in accordance with the predetermined cycle of operation; and a bias spring and cam follower operable between first and second positions for rendering said cam structure operable, said cam structure comprising an inclined surface intermediate said first and second positions and said bias spring cooperating with said inclined surface for moving said cam structure in a reverse direction to said first position.
Claim 2
Dependent Claim
108 words
In a copying machine: an imaging surface; means for producing an image on said surface; means for applying developer material to said surface; a cam structure and positive drive therefor for effecting disengagement of said developer applying means from said imaging surface and subsequent engagement therewith in accordance with the predetermined cycle of operation; and a bias spring and cam follower operable between first and second positions for rendering said cam structure operable, said cam structure comprising an inclined surface intermediate said first and second positions and said bias spring cooperating with said inclined surface for moving said cam structure in a reverse direction to said first position.
Claim 3
Dependent Claim
24 words
Structure according to claim 1 including means for opposing the force of said bias spring for maintaining said cam follower in said first position.