公开(公告)号：CA1005782A

公开(公告)日：1977-02-22

申请号：CA201424

申请日：1974-05-31

Applicant: IBM

Inventor： COWARDIN ROBERT L ,  MATUCK GEORGE C ,  MCCRAY CHARLES M ,  POWELL FLAVIUS M ,  PRATT WOODROW W ,  THOMAS DELBERT C JR ,  THORNE WILLIAM D

IPC: B41J2/24 ,  B41J3/00 ,  B41J11/04 ,  B41J11/48 ,  B41J19/16 ,  B41J25/304 ,  G06K15/02 ,  H04N1/29

Abstract: A printer is disclosed in which a character forming print head is disposed on a carriage which pivots about a central point to describe an arcuate path, adjacent to which is situated an arcuate platen. The media to be marked upon conforms to the arcuate shape of the platen. The print head oscillates or reciprocates from one end of the arc to the other, and back. The arcuate path length may be varied to encompass printing in one or more coplanar stations on an arc in the plane of the print head and pivot.

公开(公告)号：CA1149072A

公开(公告)日：1983-06-28

申请号：CA358604

申请日：1980-08-19

Applicant: IBM

Inventor： BAKER GREGORY N ,  GREENE WILLARD B ,  SIEGL LUDWIG R ,  THOMAS DELBERT C JR ,  WEBER CHARLES J ,  ZIMMERMAN LEE T

IPC: B41J2/255 ,  B41J2/245 ,  B41J19/14 ,  G06K15/00 ,  G06K15/10 ,  G06F3/12

Abstract: A printer is provided with facilities for increasing the printing throughput. This involves a partial line turnaround operation. The printer has means to move a form or document past a print line, a ribbon drive assembly, and a print assembly incorporating a plurality of print wires arranged in print head groups, each group comprising a predetermined number of print wires. If, as an example, the print assembly has two, four, six, or eight print heads, each can accommodate eight wires in the embodiment described. The print wires are arranged in a slanted serrated pattern and provision is made herein to insure that the print heads move at least far enough to print their assigned character locations prior to the performance of any turnaround in individual lines being printed. Routine involves the accessing of tables stored in conjunction with a microprocessor, the tables indicating the optimum turnaround situations for the different print head configurations. In addition, an emitter is provided BC9-78-020 in the printer unit which has character emitters, margin emitters and other emitters as well as turnaround emitters that are used in conjunction with the turnaround decision making process to reverse direction of the print head assembly in order to start printing of a new line. BC9-78-020