Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3557929 A
Publication typeGrant
Publication dateJan 26, 1971
Filing dateMay 15, 1968
Priority dateMay 15, 1968
Also published asDE1920491A1, DE1920491B2, DE1920491C3
Publication numberUS 3557929 A, US 3557929A, US-A-3557929, US3557929 A, US3557929A
InventorsFrederick W Schaaf
Original AssigneeIbm
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Programmed line pitch printer
US 3557929 A
Abstract  available in
Images(24)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent Frederick W. Schaaf Owego, N .Y.

May 15, 1968 Jan. 26, 1971 International Business Machines Corporation Armonk, N.Y.

a corporation of New York Inventor Appl. No. Filed Patented Assignee PROGRAMMED LINE PITCH PRINTER I 3 Claims, 27 Drawing Figs.

u.s.c| 197/133 Int. Cl B4ljl5/00 Field otSearch 197/19,20,

References Cited UNITED STATES PATENTS 2/1919 Corcoran 2,659,472 11/1953 Stimson 197/133 2,747,717 5/1956 Cunningham et a1 197/133 2,831,561 4/1958 Speh.......... 197/133UX 3,094,261 6/1963 Thompson. 197/133X 3,272,303 9/1966 Pohl 197/114 3,280,957 10/1966 Thiel 197/114 3,326,348 6/1967 Cralle et a1. 197/114 3,354,816 11/1967 Giannuzzi Primary Examiner-Ernest T. Wright, Jr. Att0rneysl'lanifin and Jancin and Francis V. Giolma ABSTRACT: A carriage control system provides programmed selection between values of line pitch at which a printer is to operate. Selection of one or the other of two values of line pitch is made by detecting the presence or absence of a flag bit in the first address position of a carriage control buffer used to store coded representations of channel skip commands which determine the skip operations of the printer carriage.

PATENTEDJANZSIQYI v 33551929 sum 010F24 IN VE N TOR FREDERICK w. SCHAAF ATTORNF Y PATENIEuJAnzslsn 3557.929

saw us or 24 FIG. 2 h

VOLTAGE SENSE LEVEL CARR/AGE Q CONTROL BUFFER PATENTEUJANZBIBYI 0 3557,9291

sum 18 0F 24 00/ /00/ 1/0 00/ 00/ 00 00 i 1760 00/ 00/ 00000 0 I 00/0 0000 0000/00 & 0000000 00/ 00/0 mo comm/m0 0000 00/0/00 s0/2 REJECT 0000 000/000 00/// 15a m0 0 00/ 005/ WW0! 139 I 83 0000 0/00 00 1000000 00/ 0/00 000000 mb 5b 0/10/00 000 0000 000/000 00/ INVALID 173a 000$ 000$ LATCH 0000/00 0050/ INVALID A763. CCB 00/ 000 000//r/--- CCB 0 LOAD PARITY LATCH LATCH 0 v H6b i 173 e 17)6e Li 0400000 000000; CAR|AGE 5750 0 FAILURE LATCH 00/000 00/ 00/ 0 2 mo 000/0 000 000 0000/ I 0R FIG. 2q

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1294622 *Nov 18, 1913Feb 18, 1919Underwood Typewriter CoType-writing machine.
US2659472 *Dec 28, 1949Nov 17, 1953Standard Register CoStrip feeding mechanism
US2747717 *Dec 23, 1954May 29, 1956IbmPaper feeding device
US2831561 *Apr 28, 1954Apr 22, 1958Burroughs CorpSelective control for sheet feeding apparatus
US3094261 *Jan 9, 1961Jun 18, 1963IbmTape carriage control
US3272303 *Feb 10, 1965Sep 13, 1966Carl PohlTypewriter control apparatus
US3280957 *Oct 17, 1963Oct 25, 1966Robert I ThielVariable line spacing device for typewriters
US3326348 *Dec 29, 1964Jun 20, 1967IbmVariable indexing apparatus
US3354816 *Sep 19, 1966Nov 28, 1967IbmLine printer with proportional spacing control means
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3857471 *Sep 12, 1973Dec 31, 1974Burroughs CorpTapeless paper motion control system providing sensing circuits to govern motor incrementing
US3888340 *Jun 1, 1973Jun 10, 1975Burroughs CorpVariable pitch tapeless format control system for line printers
US4026405 *Apr 28, 1975May 31, 1977Compagnie Honeywell Bull (Societe Anonyme)Process and apparatus for determining the magnitude of the paper advance commanded in a printing machine
US4311399 *Jul 25, 1979Jan 19, 1982Sycor, Inc.Method and apparatus for setting and varying margins and line spacing on data printers
US4772142 *Dec 14, 1987Sep 20, 1988Canon Kabushiki KaishaDocument processing system
US5037223 *Nov 22, 1989Aug 6, 1991Canon Kabushiki KaishaSerial printing apparatus with controllable pitch
US5108203 *Jan 17, 1991Apr 28, 1992Canon Kabushiki KaishaPrinting apparatus including error correction and memory means, for printing vertical and horizontal form lines
Classifications
U.S. Classification400/611, 400/902, 400/583.4
International ClassificationB41J11/42, G06K15/08, G06F3/12
Cooperative ClassificationG06K15/08, B41J11/42, Y10S400/902
European ClassificationB41J11/42, G06K15/08