Abstract: Data associated with printing on the sides of sheets subjected to printing by a printing apparatus are managed in the print order. The data associated with printing on the sides are output to the printing apparatus in the print order.

Abstract: When starting a printing job, a host apparatus instructs a printer to change to an occupied state in order to minimize a downtime between jobs. After the printer changes to the occupied state in response to an instruction from the host apparatus, and the host apparatus finishes transmission of the printing job, the host apparatus instructs the printer to change to a vacated state without waiting for a printing completion notification from the printer. The printer changes to the vacated state in response to an instruction from the host apparatus.

Abstract: Image data for a page having an amount of data exceeding the capacity of a printer memory is suitably output. A comparison is made among areas of buffer management blocks (TIME) in four data queues in which cyan, magenta, yellow, and black image data commands are stored. Then, the image data command having the earliest time is selected and is transferred to a printer. As a result, the image data is transferred in the order in which it is to be output in the printer.

Abstract: Upon transmission of compressed code data for respective printing color components from an information processing apparatus such as a host computer to a printing apparatus, a reception buffer memory of the printing apparatus can be effectively utilized. For this purpose, a printer driver repetitively receives drawing data regarding printing from higher processing and performs drawing. When an end of page command has been received, the drawn image data is converted to printing color component data, and a ratio of data amounts for the respective printing color components is notified to the printing apparatus based on predicted code amounts upon compression of the image data for the respective printing color components, such that the printing apparatus determines ring buffer sizes of the reception buffer memory allocated for respective color components. Then, the code data for the respective printing color components is outputted.

Abstract: This invention has as its object to achieve high-speed data transfer using an asynchronous transfer interface. An encoding program encodes source data not to include byte data of a predetermined value. An arithmetic operation program EX-ORs the predetermined value, encoded data of interest, and immediately preceding output data so that neighboring data do not have identical values in units of bytes, and outputs the result as output data. A communication program sends the output data to a printer (7). In the printer (7), a clock is generated based on a change in received data, and received data is latched and decoded in synchronism with the clock.

Abstract: On the basis of a bit sequence of a given command code, it is determined to which of repetition, copying and raw-data substitution the bit sequence applies. Based upon the result of the determination made, the data lengths of each of repetition, copying and raw data are calculated. In accordance with the calculations, at least two results from among results of repetition, copying and raw-data substitution of the encoding are combined and encoded as a command of one byte.

Abstract: A printing control method causes the printer to print data of even pages on one side of respective recording media; causes the printer to print data of odd pages to be printed on the recording medium except for the last page of it is an odd page, having print data of one of even and odd pages printed on one side to the printing means, detecting a jam on the printing means, designating the pages to be printed on both sides of recording medium which is lost due to the jam, when the jam is detected during printing of print data of another of even and odd pages by the printing means, outputting print data of one of designated pages to be printed on one side of a newly supplied recording medium to the printing means, prompting the operator to set the recording medium having print data of one of the designated pages recorded on one side thereof to the sheet feeding means, and outputting print data of another of the designated pages to be printed on another side of the recording medium having print data of one of th

Abstract: This invention has as its object to efficiently encode an image. To this end, for example, an image undergoes a color reduction process using a dither matrix with a predetermined size. A print control command is output. A compression parameter designation command that designates an up copy vertical offset value (a value according to the matrix size), a near left copy horizontal offset value (a value according to the matrix size), and a far left copy horizontal offset value (a value according to the period of background patterns), which are used in encoding, is output. Image data is encoded according to an encoding sequence.

Abstract: There is disclosed a control method for printing a plurality of pages of print data on both sides of the recording medium without using a both side printing mechanism.

Abstract: A printing control method causes a printer to print data of even pages on one side of respective recording media, thereafter causes the printer to print data of odd pages, except for the last page if it is an odd page, on the other side of the recording medium, on one side of which the data of the even pages were printed and which were manually set in the sheet feeding device by an operator, and thereafter causing the printer to print data of the last page on a recording medium different from the recording media, on one side of which the data of even pages are printed and which were manually set in the sheet feeding device by the operator, if the last page is an odd page.

Abstract: There is disclosed a control method for printing a plurality of pages of print data on both sides of the recording medium without using a both side printing mechanism.

Abstract: There is disclosed a control method for printing a plurality of pages of print data on both sides of the recording medium without using a both side printing mechanism.

Abstract: A billet made of a polycrystalline Mn-Al-C alloy magnet which is obtained by plastically deforming a Mn-Al-C alloy for magnet such as by extrusion at a temperature of 530.degree. to 830.degree. C. is used for compressive working. When the billet is hollow, it is entirely or locally compressed along the axis of the hollow billet. On the other hand, when the billet is solid, an outer circumferential portion of the billet is compressed. By the compression, the anisotropic structure of the portion where compressed is changed into an anisotropic structure having a direction of easy magnetization in radial directions. The magnet obtained by the method is also disclosed. The magnet has a radially anisotropic structure or novel structures having two different types of anisotropies therein.

Abstract: A television synchronous receiver includes: a voltage controlled oscillator; a 90.degree. phase shifter for shifting the phase of the voltage controlled oscillator output by 90.degree.; first and second synchronous detectors for synchronously detecting in-phase and quadrature components of a video carrier signal using the voltage controlled oscillator output and the 90.degree.

Abstract: Anisotropic Mn-Al-C alloy magnets exhibiting excellent magnetic characteristics in multipolar magnetization are described. The magnets are obtained by subjecting a polycrystalline Mn-Al-C alloy magnet, which is rendered anisotropic, to compressive working or extrusion at a temperature of from 530.degree. to 830.degree. C. while keeping restrained at least part of the hollow billet along its length so that the at least part is prevented from suffering compressive deformation until fed into a compressive working region. Permanent magnets obtained by the method are also described.

Abstract: A television synchronous receiver is provided which is capable of greatly reducing the mixture of the carrier chrominance signal, vestigial luminance signal, and carrier sound signal in a lower adjacent channel into the baseband video signal in a desired channel being received. The television synchronous receiver is composed of a synchronous detector for effecting synchronous detection of a television signal by using a Costas loop, and a low-pass filter for filtering an output from the synchronous detector.

Abstract: A billet made of a polycrystalline Mn-Al-C alloy magnet which is obtained by plastically deforming a Mn-Al-C alloy for magnet such as by extrusion at a temperature of 530.degree. to 830.degree. C. is used for compressive working. When the billet is hollow, it is entirely or locally compressed along the axis of the hollow billet. On the other hand, when the billet is solid, an outer circumferential portion of the billet is compressed. By the compression, the anisotropic structure of the portion where compressed is changed into an anisotropic structure having a direction of easy magnetization in radial directions. The magnet obtained by the method is also disclosed. The magnet has a radially anisotropic structure or novel structures having two different types of anisotropies therein.

Abstract: A synchronous receiver having a reduced pull-in time without requiring a frequency error detection circuit using a differentiator is provided with a voltage-controlled oscillator, a 90.degree. phase shifter which shifts the phase of an output from the voltage controlled oscillator by an angle of 90.degree., first and second synchronous detectors which detect an in-phase component and a quadrature component of a video carrier signal, a phase detector for detecting a phase difference between the video carrier signal and the output of the voltage-controlled oscillator, a first low pass filter for filtering the output of the phase detector, a frequency discriminator for discriminating the frequency of an audio IF signal generated by the first synchronous detector and a second low pass filter for filtering the output of the frequency discriminator.

Abstract: A television synchronous receiver is arranged to maintain a 90.degree. phase difference in the broad frequency band of a TV broadcast between a local oscillator signal and another local oscillator signal. This allows a pair of synchronous detectors to detect the in phase components and quadrature components of a received television broadcast signal. A Costas loop is utilized in the generation of the 90.degree. phase difference.

Abstract: There is provided a method of producing a manganese-aluminum-carbon alloy magnet, including the steps of preparing a polycrystalline Mn-Al-C alloy magnet having a specified direction of easy magnetization and subjecting the magnet to compressive working in that direction at a temperature of 550.degree. to 780.degree. C., the degree of said compressive working being equivalent to a logarithmic strain of .ltoreq.-0.1 and working in said step at least up to a logarithmic strain of -0.1 being free compression.