Abstract: A printing unit includes a head unit; a platen unit separately combined with the head unit; a fixed blade provided to the platen unit; a movable blade, which is provided to the head unit and is relatively movable with respect to the fixed blade; a drive mechanism, which includes a drive rack coupled to the movable blade, and moves the movable blade between a standby position being separated from the fixed blade and a cutting position at which the movable blade rides on the fixed blade; an operation lever being movable between a lock position and a releasing position; and a return mechanism configured to move the movable blade from the cutting position toward the standby position side through intermediation of the drive rack in association with the operation lever.

Abstract: A printing unit includes a head unit; a platen unit separately combined with the head unit; a fixed blade provided to the platen unit; a movable blade, which is provided to the head unit and is relatively movable with respect to the fixed blade; a drive mechanism, which includes a drive rack coupled to the movable blade, and moves the movable blade between a standby position being separated from the fixed blade and a cutting position at which the movable blade rides on the fixed blade; an operation lever being movable between a lock position and a releasing position; and a return mechanism configured to move the movable blade from the cutting position toward the standby position side through intermediation of the drive rack in association with the operation lever.

Abstract: A printer includes a rocking member with a rotary shaft and a bearing portion for axially supporting a platen roller, and a latch member having a protrusion. The latch member is rotatably connected to the rotary shaft portion of the rocking member so as to be rotatable about a rotary axis that is non-coaxial with and parallel to a platen axis. The rotary shaft portion of the rocking member projects along the rotary axis from an inner side surface of the rocking member. A stationary frame supports a recording head and includes a first recess into which the bearing portion of the rocking member is disengageably fitted and a second recess into which the protrusion of the latch member is disengageably fitted after the bearing portion is fitted in the first recess.

Abstract: A printer has first and second units configured for attachment/detachment relative one another and for supporting one of a recording head and a platen roller. The first unit has spaced wall portions provided with first and second recesses. The second unit has engagement pins that detachably fit into respective ones of the first recesses, a latch member that undergoes rotation about an axial line of the engagement pins and has a pair of lock pins that detachably fit into respective ones of the second recesses after the engagement pins are fitted in the first recesses, a biasing member biasing the latch member in a first direction of detachably fitting the lock pins in the second recesses, and a release member for moving the lock pins in a second direction opposite to the first direction to detach the lock pins from the second recesses.

Abstract: When a certain dot line is printed, in a case where a head power supply time for a thermal head unit is shorter than a motor stepping time so that an idle time is present, and it is predicted that, in a succeeding dot line, the head power supply time is longer than the motor stepping time and the motor stepping time becomes long, a printing control unit of a printing apparatus starts printing the succeeding dot line before succeeding motor stepping is started.

Abstract: Provided is a printer in which attachment and detachment manipulation of a platen roller can easily be performed, in which the platen roller can be retained with high reliability at a time of attachment, and in which downsizing of the entire printer is achieved due to use of the platen roller smaller in diameter.

Abstract: Provided is a printer in which attachment and detachment manipulation of a platen roller can be easily performed, in which the platen roller can be retained with high reliability at a time of attachment, and in which downsizing of the entire printer is achieved due to use of the platen roller smaller in diameter.

Abstract: Provided is a printer capable of reliably combining a main unit and a detachable unit with each other, performing smooth attachment/detachment operation of the detachable unit, easily achieving miniaturization, and suppressing interference with fingertips during the attachment/detachment operation, to thereby increase safety. The printer includes: a main unit (10) including opposed walls (62); and a detachable unit (11) combined with the main unit so as to be attached to/detached from the main unit freely. The detachable unit includes: an engagement pin (50) protruding along an axial line which is non-coaxial and parallel with respect to a platen shaft of a platen roller (5); and a lock pin (51) movable relative to the engagement pin. The opposed walls each include: a first recess (65) and a second recess (66) allowing the engagement pin and the lock pin to be fitted detachably therein, respectively.

Abstract: A thermal printer has a thermal head mounted on a case main body and a platen roller confronting the thermal head. A cover member mounted to the case main body undergoes swinging movement to open and close an opening of the case main body. A slider rotatably supports the platen roller and is mounted to the cover member for linear movement on a plane including a rotational center of the platen roller and a swing center of the cover member. Engagement pieces mounted to the slider engage with engagement portions of the case main body when the cover member closes the opening of the case main body and the platen roller confronts the thermal head. A biasing member biases the slider such that the engagement pieces engage with the engagement portions of the case main body and the platen roller is brought into pressure contact with the thermal head.

Abstract: To reduce sticking without increasing a print time period in a thermal printer, a printing method comprises: an energizing start delay time calculating procedure of calculating delay time from end of paper feed of the thermal paper until start of energizing of the thermal head based on interval time of paper feed of the thermal paper that is performed in a step manner and energization time for energizing the thermal head correspondingly to data to be printed; a measuring procedure of measuring elapsed time after the end of the paper feed of the thermal paper; an energizing procedure of energizing the thermal head after the delay time calculated in the energizing start delay time calculating procedure has passed based on a result of the measurement obtained in the measuring procedure; and a paper feed procedure of moving the thermal paper in a step manner after end of the energization of the thermal head in the power supplying procedure.

Abstract: It is an object of the present invention to provide a thermal printer in which a space in a back surface side of a thermal head can be made smaller, an entire width dimension can be reduced, and heat sensitive paper is sandwiched between the thermal head and a platen roller with a sufficient pressurizing force, to perform clear printing.

Abstract: Provided is a platen roller retaining structure which is small, of a simple construction and easily allows attachment/detachment of a platen roller and which provides a high level of reliability in terms of platen roller retention. A shaft portion (2a) of a platen roller (2) is fitted into a connecting portion (3a) of a regulating member (3), and the shaft portion (2a) and an engagement portion (3b) of the regulating member (3) are respectively inserted into a first recess (5) and a second recess (6) of a stationary frame (4), with an outer peripheral portion (2b) of the platen roller (2) being held in contact with a thermal head (1) to make recording possible. Escape of the shaft portion (2a) from the first recess (5) in direction (A) is prevented by an inner peripheral edge (5a).

Abstract: Provided is a platen roller retaining structure which is small, of a simple construction and easily allows attachment/detachment of a platen roller and which provides a high level of reliability in terms of platen roller retention. A shaft portion (2a) of a platen roller (2) is fitted into a connecting portion (3a) of a regulating member (3), and the shaft portion (2a) and an engagement portion (3b) of the regulating member (3) are respectively inserted into a first recess (5) and a second recess (6) of a stationary frame (4), with an outer peripheral portion (2b) of the platen roller (2) being held in contact with a thermal head (1) to make recording possible. Escape of the shaft portion (2a) from the first recess (5) in direction (A) is prevented by an inner peripheral edge (5a).

Abstract: A stabilized oscillator circuit is provided with a differential amplifier type oscillator circuit for generating an oscillation signal, and a differential amplifier type buffer output circuit for amplifying and outputting the oscillation signal. The stabilized oscillator is also provided with a frequency variation stabilizing circuit. This circuit controls the amount of current of the constant current source I2 of the buffer output circuit, in accordance with fluctuations of the power supply voltage applied to the oscillator circuit. Accordingly, the collector-base capacitance of the transistors of the buffer output circuit is controlled, and the oscillation frequency variations are suppressed in spite of fluctuations of the power supply voltage.

Abstract: An apparatus for catalytic reaction containing a heating chamber having a hearth, side wall(s) and a roof, and an inlet and outlet for a heat source gas; a substantially vertically mounted concentric double cylindrical tubular reactor mounted in said roof and protruding into the space within said heating chamber; a gas-permeable dividing means which divides the space within the heating chamber into an upper convection heat transfer space and a lower radiant heat transfer space is useful in steam reforming and similar processes.

Abstract: An apparatus for an endothermic reaction, such as steam reforming of hydrocarbon gas, comprises a reaction vessel sandwiched or surrounded by heat generating apparatus. In the heat generating apparatus, a primary fuel gas and air are supplied and mixed therein, then pass through a fuel gas heating section therefor, a combustion catalyst bed, a combustion section and a discharge section in that order. A secondary fuel gas is supplied into the combustion section, typically in a plurality of stages. The primary fuel gas mixture is heated up or ignited in the preheating section, burns and passes through the catalyst bed. At least a part of the combustion section is packed with heat transfer bodies. The gas from the catalyst bed burns in the combustion section with the secondary fuel. The heat transfer bodies receive heat from the combustion gas passing therethrough by convection and radiates the heat to the reaction vessel.