Abstract: A printing apparatus that enhances light transmittance of overhead projector (OHP) sheets while preventing any deterioration in printing speed. The apparatus can compare a divider assembly located between a printing unit and a printed paper tray. The divider assembly feeds print media selectively to an OHP processing unit or to the printed paper tray. An OHP sheet printed in color is fed by the divider assembly to the OHP processing unit which prepares the sheet for OHP applications. An OHP sheet printed in monochrome is fed by the divider assembly to the printed paper tray without passage through the OHP processing unit.

Abstract: A printer enables discrimination of the kind of a printing medium and automatically controls whether the medium is to be thermally processed or not by the result of the discrimination, while enabling reversal of the execution or inexecution of the heating process if necessary. A control portion is able to discriminate the kind of a printing paper based on a signal output from a detector and changeover automatically, whether the printing paper is to be thermally processed or not, in moving a diverter from a first position to a second position by controlling a solenoid. A user can reverse the execution or inexecution of a heating process of a printed paper in operating the diverter by the operation of a reverse key provided in a control panel.

Abstract: A paper edge detecting device for a printing apparatus in which a paper margin of a print paper can be detected with high accuracy. A mark printing process is executed upon power-on of a printer, so that a carriage is displaced from an original position H0 to a position corresponding to a set pulse number H.sub.P and stopped at that position to print on the print paper a linear mark M aligned in a direction perpendicular to a displacement direction of the carriage. Thereafter, a mark detection process is executed, and the carriage is displaced from the original position H0 until the mark M is detected by the photosensor. Subsequently, a correction amount generating process is executed to calculate a correction value .alpha. on the basis of the set pulse number H.sub.P and the count value C.sub.P when the mark M is detected by the photosensor.

Abstract: Image data supplied from an external equipment is stored in an image data memory. The size of an outline region determined on the basis of the image data is compared with the size of the printable region of selected paper, stored in a size memory. If the outline region is larger, paper having a size larger than that of the selected paper is selected. Data of linear marks indicative of cut positions on the extension lines of virtual boundaries of the outline region is calculated on the basis of data of a pair of corners in the image data, to be synthesized with the image data supplied from the external equipment, for a print operation with respect to the print paper.

Abstract: A facsimile apparatus has a first operating mode in which first data entered through an interface from an external unit is received in precedence over second data entered through a modem from other facsimile apparatus over a communication line, and a second operating mode in which the second data is received in precedence over the first data, and is operative to receive and print data in accordance with the mode of priority order set on a switch. The apparatus is provided with two sheet delivery ports so that print paper (print sheet) on which the first data is printed and print paper (reception sheet) on which the second data is printed are delivered separately to the respective delivery ports. The apparatus allows the user to obtain a printed sheet of urgent data immediately, and also frees the user from hand separation of print sheets and reception sheets.

Abstract: An ink jet printer having a pressing mechanism for pressing a print head against a sheet of paper set on a platen by rotating an eccentric shaft, a driver for feeding the paper under the condition where the print head is in pressure contact with the paper to carry out cleaning of the print head, a photosensor for detecting whether or not the paper is present at a printable position, and an eject controller for ejecting the paper after carrying out test printing of a plurality of predetermined characters on the paper when the sufficient remaining paper is detected after ending the cleaning of the head or, alternatively, ejecting the paper without carrying out the test printing when it is determined there is insufficient paper detected after ending the cleaning of the head.

Abstract: A recording device for recording on a sheet is provided with a heater for heating portions of the sheet on which printing is to be carried out. The heater is controlled by a memory which stores data related to the period of time required to heat the portions of the sheet to a predetermined temperature value as well as the time required to heat a preceding portion of the sheet.

Abstract: A serial printer with a dot print head which prints print data produced in accordance with a page describing language. In this serial printer, it is judged whether or not character data is included in the print data and, if included, whether or not character data printable by the dot print head in a single scanning stroke exists in the character data previously judged, whereby the character data non-printable in a single scanning stroke of the head is printed similarly to graphic data included in the print data after being converted into image data, and the character data printable in a single scanning stroke of the head is printed independently of graphic data. Consequently, the character data can be printed without displacement of dots according to print ability of the dot print head and excellent print quality of the characters can be obtained.

Abstract: A sheet detection apparatus is provided which determines the presence or absence of a sheet on a sheet feed path as well as the type of sheet. The apparatus utilizes a light source to direct a predetermined amount of light to a sensor by reflecting off a sheet on the feed path or a reflector in the absence of any such sheet on the path. The presence or absence of the sheet is determined by comparing the output value of the sensor with predetermined reference values.

Abstract: A printing apparatus having a carrier which reciprocates along a print line defined on a platen, comprising a first printing assembly supported on the carrier and having type elements abuttable on the platen for printing characters, and a second printing assembly supported on the carrier for printing characters by a dot matrix. The first and second printing assemblies have a first and second print point, respectively, which are spaced from each other in a direction parallel or perpendicular to the print line. Each print assembly has its own ribbon cassette; one is parallel to the print line and one is perpendicular to the print line.

Abstract: An image sensing head of an image reading device and a method of producing same are disclosed. The image sensing head includes a plurality of optical fibers and light emitting and light receiving elements supported in a manner to provide a unitary structure. The optical fibers of the light emitting side and the optical fibers of the light receiving side are each formed as a sheet and arranged such that the read-out ends of the optical fibers of the light emitting side are located in positions in which they supply read-out light beams to an image surface of a document and the light emitting ends thereof are located in positions corresponding to those of the light emitting elements while the read-out ends of the optical fibers of the light receiving side are located in positions in which they receive light beams reflected by the image surface of the document and the light receiving ends thereof are located in positions corresponding to those of the light receiving elements.

Abstract: Disclosed is a photoelectric encoder for providing an electrical pulse signal corresponding to the rotational position and direction of a disk rotor. The encoder possesses a feedback means including a second light sensitive means and associated circuit for obtaining the stabilized output signal thereof in spite of the fluctuation of the power source voltage and/or ambient temperature or adhesion of extraneous substances to light emitting and/or sensing elements and others.

Abstract: A printing apparatus having a first and a second printing assembly supported on a carrier which reciprocates along a line of printing defined on a platen. The first printing assembly has type elements adapted to be abuttable on the platen for printing characters on a sheet of paper supported on the platen, along the line of printing. The second printing assembly is adapted to print the characters with a matrix of dots. The first and second printing assemblies are so disposed that their print points are spaced from each other along the surface of the platen. The apparatus comprises first and second control units for controlling the operations of the first and second printing assemblies, respectively, according to input printing data.

Abstract: A display apparatus comprising a display device for displaying a character and one or more special symbols to modify the character, by means of a dot matrix, and a control means for controlling the display device. The special symbols may be an underline sign, a bold face sign, etc. The control means effect alternate display at the same position on the display device, of a desired character and one or more special symbols to modify the desired character.

Abstract: An electronic apparatus comprising a memory and a memory backup power source for supplying power to the memory when normal power supply to the apparatus is interrupted; wherein after resumption of normal power supply to the apparatus, and error signal is generated when the voltage of the memory backup power source is below a predetermined value, indicating that the content of the memory is not reliable. Circuitry to inhibit recharging of the backup power source and prevent read/write operations during the voltage checking period is also included.

Abstract: Method of preparing plural documents based on one text, with partial alterations from one document to another, comprising: storing into a first memory plural sets of phrase data which represent different phrases to be inserted into the respective documents and which are designated by respective phrase-indicating codes; storing into a second memory at least one set of work data comprising selected ones of the phrase-indicating codes and designated by a working-group code; storing into a third memory at least one set of text data representing a text of document and including the working-group code at a position corresponding to a part of the text which is altered; and reading out the text data from the third memory plural times corresponding to the number of the documents to be prepared, while upon reading of the working-group data, reading out from the first memory the sets of phrase data as the same are sequentially designated by the phrase-indicating codes of the work data designated by the working-group cod

Abstract: A drive control system for controlling a drive motor in response to external command signals. The system comprises a first control arrangement for obtaining numerical values corresponding to amounts of successive intermittent operations of the drive motor responsive to respective external command signals, summing the obtained numerical values, and subtracting from a current sum of the numerical values a numerical value corresponding to a non-operation time period during which the drive motor is held at rest between the successive intermittent operations. The system further comprises a second control arrangement for inhibiting the operation of the drive motor responsive to the next command signal, for a length of time corresponding to the current sum after the drive motor has completed each of the intermittent operations, whereby the temperature of the drive motor is kept below an upper limit.

Abstract: A paper holding, feeding and inserting apparatus for a printer, comprising a first paper stacker for storing sheets of paper of one kind, a paper feeding device to feed the sheets from the first paper stacker to a printing station, and a second paper stacker which receives the printed sheets and is supported pivotally from its operative position to its inoperative position at which is provided a path along which a sheet of paper of another kind is inserted to the printing station. A drive motor to drive feed rollers of the paper feeding device may be controlled such that its operating speed is changed from an initial low speed to a higher speed during the feeding of a sheet to the printing station.

Abstract: A paper feeding apparatus in a printer, wherein a sheet of paper placed on a rotary support member is fed by a predetermined distance through a corresponding angle of rotation of a drive motor which is energized by a drive circuit under control of a control device which applies a control signal to the drive circuit to give a predetermined angle of rotation to the drive motor and thereby effect a paper feeding cycle each time the control signal is applied. The control device includes control means for adapting the control signal so as to progressively increase the operating speed of the drive motor up to a predetermined level when the application of the control signal takes place more than a predetermined time interval after termination of the previous paper feeding cycle.

Abstract: A printing apparatus having a printing assembly and a paper handling assembly including a paper feeding device for feeding sheets of paper of one kind from a first paper stacker along a first path and further including a paper advancing device selectively advancing to the printing assembly either the sheets of paper of the one kind or sheets of paper of another kind fed along a second path. The apparatus comprises a first memory for storing information representing margin positions and tabulation positions, and other data associated with the sheet of paper of one kind, a second memory for storing similar information associated with the sheet of paper of another kind, a detector for detecting an operative or inoperative position of the paper feeding device and generating a signal representing the detected position, and a control device responsive to the signal from the detector and selecting the first or second memory.