[75] Inventors: Shigeru Okamura, Yokohama;
Hiroshi Kyogoku, Kawasaki;
Shigemitsu Tazaki, Matsudo, all of
Japan
[73] Assignee: Canon Kabushiki Kaisha, Tokyo, Japan
[21] Appl. No.: 114,202
[22] Filed: Jan. 22, 1980
[30] Foreign Application Priority Data
Jan. 31, 1979 [JP] Japan 54/10181
Feb. 21, 1979 [JP] Japan 54/19227
[51] Int. C1.3 G01D 15/16; G01D 15/24
[52] U.S. CI 346/140 R; 346/75
[58] Field of Search 346/139 R, 75, 139 A,
346/139 B, 139 C, 139 D, 140 R, 140 A, 141-143; 318/687, 640, 616; 310/13; 400/126,
322
[56] References Cited
U.S. PATENT DOCUMENTS
3,708,681 1/1973 Ivers 318/640 X
3,899,699 8/1975 Griffing 310/13
4,012,676 3/1977 Giebler 318/687 X
4.106.029 8/1978 Albarda et al 346/139 R X
4.183.030 1/1980 Kaieda 346/140
4,219,765 8/1980 Morsing 318/616 X
FOREIGN PATENT DOCUMENTS
2725727 12/1977 Fed. Rep. of Germany 346/140
PD
Primary Examiner—G. Z. Rubinson
Assistant Examiner—W. J. Brady
Attorney, Agent, or Firm—Fitzpatrick, Cella, Harper &
Scinto
[57] ABSTRACT
Ink jet recording apparatus includes a guide member provided in parallel to a transversal direction of a recording sheet, a carriage having a recording head and adapted to move on the guide, a signal generator provided in parallel to the guide, and a control unit for causing the signal generator to detect position and speed of the carriage.
10 Claims, 18 Drawing Figures
