Abstract: The invention provides an image duplicating apparatus capable of performing duplicating operations with its whole operation time shortened by the simple speed adjustments, without increasing the size of the memory as much as possible and its costs. When images are duplicated, for example, at full scale, a CPU starts executing the input/output processing of the image line data. The image line data is written into a line buffer memory and at least one line of the image line data written in the line buffer memory is retained. Upon the receipt of the data output request from the printing unit, the CPU reads out the image line data retained in the line buffer memory and outputs it to the printing unit. The CPU repeatedly performs the above-described steps. The duplicating operations may be performed with the space for storing at least two lines of the image line data secured in the line buffer memory.

Abstract: An image reading apparatus for reading out images on an image carrying paper sheet is provided. The apparatus includes a motor for feeding the image carrying paper sheet. The motor is driven by a motor driving unit on the basis of motor controlling data. The image reading apparatus further includes a generator for generating the motor controlling data, a photoelectric converter for generating image signals corresponding to the images. The apparatus also includes a register for holding the motor controlling data from the motor controlling data generator. The motor controlling data held by the register are advantageously supplied to the motor driving unit after a predetermined delay time by way of a delay unit which includes a latch circuit for holding the motor controlling data from the register, and a counter associated with the latch circuit.

Abstract: A method and a device for transmitting print data from a computer to a print control device for controlling a printer, wherein a desired one of attribute data sets which accompany respective image data sets is replaceable by a new image data set in a data transmission mode of the computer, and the attribute data set accompanying the original image data set replaced by the new image data set is suitably changed according to the new image data set. The print data including the new image data set and the changed attribute data set are transmitted to the print control device. The print data may include direct image data such as bit map data, and non-direct image data which include indirect image data such as character data and graphic data, and print control data such as attribute data.

Abstract: A method and a device for transmitting print data from a computer to a print control device for controlling a printer, wherein a desired one of attribute data sets which accompany respective image data sets is replaceable by a new image data set in a data transmission mode of the computer, and the attribute data set accompanying the original image data set replaced by the new image data set is suitably changed according to the new image data set. The print data including the new image data set and the changed attribute data set are transmitted to the print control device. The print data may include direct image data such as bit map data, and non-direct image data which include indirect image data such as character data and graphic data, and print control data such as attribute data.

Abstract: A method and a device for transmitting print data from a computer to a print control device for controlling a printer, wherein a desired one of attribute data sets which accompany respective image data sets is replaceable by a new image data set in a data transmission mode of the computer, and the attribute data set accompanying the original image data set replaced by the new image data set is suitably changed according to the new image data set. The print data including the new image data set and the changed attribute data set are transmitted to the print control device. The print data may include direct image data such as bit map data, and non-direct image data which include indirect image data such as character data and graphic data, and print control data such as attribute data.