Abstract: This invention provides a printing system capable of minimizing the blurring of ink which would otherwise accompany color printing, and of reducing the time required for color printing. A first black printer head 12a1, and color printer heads 12b1 to 12b3 are arrayed in parallel along the direction in which a carriage moves. A second black printer head 12a2 is placed such that it is displaced by a certain distance in the medium advance direction with respect to the array comprising the first black printer head 12a1 and color printer heads 12b1 to 12b3, and prints dots such that the dots do not overlap with those printed by the first black printer head 12a1 or by the color printer heads 12b1 to 12b3 within any given band.

Abstract: A cam 37 is rotated in an arrow F direction. This causes sheet conveyance rollers 10a, 10b and guide elements 33, 34 to rotate on a lower conveyance shaft 27 and an upper conveyance shaft 30, respectively, so that they are separated from a drive roller 12. Thus, a spur plate 21 faces the upward stream end with respect to the recording sheet conveyance direction and opens in synchronism with the sheet conveyance rollers 10a and 10b, etc. Accordingly, it is possible to readily remove a recording sheet subjected to the jam.

Abstract: A data communication unit (1) receives input image data of a first data format which comprises coordinate data of the end points of vectors forming an image and various modifying information of the vectors, and stores them in an input buffer (2). A data analyzer unit (3) converts the input image data into image data of a second data format and stores the data in a storage unit (6). The second data format holds the various modifying information independently of the coordinate data of the end points, decreasing the amount of data compared with the first data format. Based on the image data of the second data format, the data analyzer unit (3) generates, in a band-by-band manner, intermediate codes comprising coordinate data that constitute the contours of the vectors reflecting the various modifying information. The intermediate codes are converted into corresponding raster data in a band-by-band manner, and are printed as an image by a printer unit (10).

Abstract: A copying machine includes first and second original exposing sections and an optical system having a movable reflector. The optical system is so arranged as to permit a real image to be obtained when the reflector is moved in a first position corresponding to the first original exposing section and a mirror image to be obtained when the selective optical member in a second position corresponding to the second original exposing section.