摘要:
A printer is capable of preventing the formation of creases in a portion of an ink ribbon corresponding to a print head and of printing characters and images in good print quality without forming streaks attributable to creases in the ink ribbon. A main frame supports a feed spool and a takeup spool so that an ink ribbon extends between the feed spool and the takeup spool. A print head support frame supporting a print head and an ink ribbon guide is supported pivotally at one end thereof on the main frame. When the print head support frame is locked in place on the main frame, the ink ribbon guide depresses the ink ribbon so that the tension of a portion of the ink ribbon on one side of the main frame is higher than that of a portion of the same on the other side of the main frame while the printer is in an unoperational state and tension is distributed uniformly across a portion of the ink ribbon corresponding to the print head while the printer is in an operational state. Thus, creases are not formed in the ink ribbon while the printer is in the operational state.
摘要:
A pulley holder for rotatably supporting a pulley around which a belt is wound, in which the pulley holder includes a shaft having a shaft body for supporting the pulley and a projection at least one end of the shaft body in its axial direction, and a holder body having a bearing for supporting the shaft body, and a fitting part for fitting the projection. Since the projection is biased from an axis of the shaft body, once the projection is fit into the fitting part, the shaft body would not rotate around the axis. Accordingly, a friction wear of the bearing of the holder body is prevented and thus a shift in conveying a carriage is prevented.
摘要:
An image recording apparatus including a housing; a recording head which ejects droplets of ink; a carriage which is provided in the housing and which carries the recording head and reciprocates in opposite directions; an ink supply tube which is connected, at one end thereof, to a tube connection portion of the carriage so as to supply the ink to the recording head, and is fixed, at a fixed portion thereof, to the housing such that an intermediate portion thereof located between the one end thereof and the fixed portion thereof forms a curved portion convex in one of the opposite directions, wherein the ink supply tube has a flexibility assuring that when the carriage reciprocates, the ink supply tube follows reciprocation of the carriage while the curved portion thereof changes a shape thereof; a pivotable support member which is supported by the housing such that the support member is pivotable about a supporting point, wherein the support member includes an arm portion having a support portion that supports a portion of the curved portion of the ink supply tube; and a stopper member which is fixed to a predetermined portion of the ink supply tube that is located between the support portion and the tube connection portion, and which, when the ink supply tube moves relative to the support portion, engages the support portion so as to inhibit an excessive movement of the ink supply tube relative to the support portion.
摘要:
An image recording apparatus includes: a carriage that carries a recording head capable of recording an image on a recording medium and reciprocates in a main scanning direction; a substantially box-shaped main frame having an open upper side and a pair of side plates extending in a sub-scanning direction orthogonal to the main scanning direction; and first and second guide members over which the carriage extends and by which the carriage is guided, the first and second guide members being disposed to be apart from each other by a predetermined distance in the sub-scanning direction, extended in the main scanning direction at the upper side of the main frame and fixed to the pair of side plates.
摘要:
Automatic composition apparatus and method are provided which are capable of modifying a rhythm pattern to provide a wide variety of rhythm patterns only through simple setting, and a storage medium that accomplishes this function is provided. Characteristics of a rhythm pattern of a piece of music to be composed are established. Characteristic data that match the established characteristics are retrieved from a rhythm pattern database rhythm pattern database comprising a plurality of rhythm patterns and characteristic data indicating characteristics of each of the rhythm patterns. One of the rhythm patterns is selected, that corresponds to the retrieved characteristic data. Accordingly, different rhythm patterns having the same characteristics can be easily obtained. Further, composition conditions to be applied to a whole piece of music to be composed are established, and the established composition conditions are allocated to each of sectional elements that constitute the piece of music, for example, a passage, a phrase, or a measure, and the composition conditions for the whole piece of music, in other words, distributed among the respective passages, phrases or measures. Therefore, a rhythm pattern having different characteristics may be obtained by changing only the characteristics of the whole piece of music, thus assuring an improved efficiency with which the user operates the apparatus.
摘要:
A sheet feeding device for feeding a sheet stacked on a sheet cassette to an image forming portion of an image recording apparatus. The sheet feeding device includes a sheet supplying roller unit and a sheet feed roller positioned downstream thereof. The sheet supplying roller unit includes an intermediate small diameter portion and integral large diameter portions positioned to interpose the small diameter portion therebetween. Each large diameter portion has a contacting area in contact with the sheet, whereas the intermediate small diameter portion is spaced away from the sheet. A sheet edge detection arm is swingably provided and contactable with the sheet fed by the contacting area. The sheet edge detection arm is movable into a space defined between the small diameter portion and a confronting separation pad. If sheet is fed by the sheet supplying roller unit, the sheet edge detection arm is urged by the sheet and a posture of the arm is changed. The arm is abuttable to a lever member which is pivotally movable in accordance with the movement of the sheet edge detection arm. A photosensor is provided at a moving locus of the lever member. When the lever member moves across the photosensor, sheet edge detection signal is generated.
摘要:
A sheet feed mechanism has an array of suction cups into and out of contact with an uppermost one of stacked sheets in a sheet cassette. After the suction cups are held against the uppermost sheet, a vacuum is developed in the suction cups to enable the suction cups to attract the uppermost sheet. Then, the suction cups are lifted with the uppermost sheet attracted thereto, and a leading end of the attracted and lifted uppermost sheet is nipped, and the sheet is delivered into a sheet feed path. When the suction cups are lifted, they are angularly moved about an axis to cause the leading end of the attracted uppermost sheet to be obliquely separated from other stacked sheets.
摘要:
An electronic musical instrument comprises a keyboard, a tone signal forming circuit to produce musical tone signals corresponding to keys being depressed on the keyboard, a memory to store musical performance data, a keyboard display device to visually instruct a pupil or trainee as to which keys are to be depressed on the keyboard in accordance with the performance data read out of the memory so that the pupil or trainee may effect a musical performance on the keyboard while following key indications, and an automatic musical performance device to effect an automatic musical performance of different type from the musical performance effected on the keyboard. The pupil or trainee may selectively effect the musical performance on the keyboard with or as the accompaniment by or for the automatic musical performance. Preferably the pupil or trainee effects a melody or chord performance on the keyboard with the accompaniment of an automatic chord performance and/or an automatic rhythm performance, or an automatic melody performance and/or an automatic rhythm performance.
摘要:
An automatic rhythm performing apparatus comprises a rhythm pattern generator for generating stressed beat pattern pulses representative of stressed beats of a rhythm to be generated and relaxed beat pattern pulses representative of relaxed beats of the rhythm, a tone generator, a rhythm gate coupled to the tone generator and a mute gate coupled to the rhythm gate. The rhythm gate is operative to impart a decayed envelope to a tone signal from the tone generator in reponse to each of the stressed beat pattern pulses and the mute gate is operative to suppress a portion of a decayed output signal from the rhythm gate in response to each of the relaxed beat pattern pulses. The automatic rhythm performing apparatus can be used for an automatic chord performance of a keyboard type electronic musical instrument.
摘要:
A carriage driving unit comprises a carriage, an timing belt, an timing belt, which is jointed to the carriage, looped around between a driving pulley attached to a driving shaft of a motor and a driven pulley attached to a driven shaft, a frame for rotatably supporting said driving shaft in a cantilever manner and a regulating projection for regulating the timing belt from displacing in a direction closer to said frame with respect to said driving pulley.