公开(公告)号：CA1204872A

公开(公告)日：1986-05-20

申请号：CA454742

申请日：1984-05-18

Applicant: IBM

Inventor： CHAMBERLAIN SAVVAS G ,  PENNINGTON KEITH ,  ROHRER GENE D

IPC: G06G7/19 ,  H04N1/409

Abstract: The invention discloses apparatus for receiving a plurality of inputs and subjecting the inputs to a Laplacian operator function. The apparatus comprises CCD shift register means for receiving the inputs and introducing positive and negative weights to respective ones of the inputs, and combines the inputs to produce the Laplacian operator function.

公开(公告)号：DE3164510D1

公开(公告)日：1984-08-09

申请号：DE3164510

申请日：1981-03-06

Applicant: IBM

Inventor： AVIRAM ARI ,  KUHN LAWRENCE ,  PENNINGTON KEITH

IPC: B41J2/325 ,  B41J2/32 ,  B41J31/14 ,  B41M5/025 ,  B41M5/382 ,  C25D13/06 ,  C25D13/16 ,  B41M5/26

Abstract: The process for selectively reinking used thermal transfer printing ribbons comprises the stationary or moving exposure of the ribbon to a pigment-containing polymeric colloidal dispersion of electrophoretically depositable ink, and passing an electric current through said colloidal dispersion, with an electrically conductive layer of said ribbon serving as one electrode, to electrophoretically deposit the said colloidal dispersion on areas of said ribbon that have been depleted of ink in a previous printing operation, to form a continuous ink layer of uniform … The method of making said colloidal dispersion involves heating a water-insoluble polymeric binder to a liquid state, blending a pigment into the melted polymeric binder, blending a heated dilute aqueous solution of a carboxylic acid into the foregoing, then blending a colloid charge-forming com pound to the composition, and cooling the dispersion so formed.