摘要:
An image forming apparatus includes a driving roller for transporting a medium; a follower roller disposed to face the driving roller for transporting the medium; a guide member for guiding the medium to change a transport direction thereof by an angle greater than 30°; and a rotational member disposed to be freely rotatable at a position corresponding to a side edge of the medium. Accordingly, after the driving roller and the follower roller transport the medium, when the medium contacts with the guide member, side edges of the medium contact with the guide member at an angle smaller than that of a center portion of the medium contacting with the guide member.
摘要:
An image forming apparatus includes a driving roller for transporting a medium; a follower roller disposed to face the driving roller for transporting the medium; a guide member for guiding the medium to change a transport direction thereof by an angle greater than 30°; and a rotational member disposed to be freely rotatable at a position corresponding to a side edge of the medium. Accordingly, after the driving roller and the follower roller transport the medium, when the medium contacts with the guide member, side edges of the medium contact with the guide member at an angle smaller than that of a center portion of the medium contacting with the guide member.
摘要:
A resist film for protecting a circuit pattern is coated onto a circuit pattern formed on a circuit board, and further, a part of the resist film with which another unit comes into contact is coated with a thermosetting film. Namely, the other unit is brought into contact with a part of the circuit pattern coated with the thermosetting film, and thus, the other unit and the resist film do not come into contact with each other directly, regardless of whether or not the other unit has a high temperature.
摘要:
A method or system for bringing a movable element of a stepper motor to its home position by mechanically blocking the movable element from further moving from the home position, wherein the movable element is moved in one direction by repeating an energization cycle in which windings for sequentially establishing different energization phases are energized in a predetermined sequence at a predetermined interval from one phase to another. After the movable element is mechanically blocked, a motor driver circuit energizes at least one of the windings which corresponds to at least one of the energization phases that precedes another of the energization phases which corresponds to the home position of the movable element. This energization of the winding or windings for each preceding phase continues for a time longer than the predetermined energization interval of the normal energization cycle. Then, the phase corresponding to the home position of the movable element is maintained to hold the motor stopped at the predetermined home position.
摘要:
The present invention provides an N phase/N+1 phase energization type stepper motor controller for alternately energizing an N number and an N+1 number of phases where N is an integer equal to or greater than one. The controller detects which phase(s) is(are) energized at a time when the stepper motor is paused, and sets a starting pulse width for N phase energization to be made shorter than that of N+1 phase energization, in response to the detected results. When the initial energization in starting is N+1 phase, a driving pulse having a width which is longer than that N phase for energization is outputted. The N+1 phase energization has stronger magnetism for rotating a rotor than N phase energization, thereby increasing the rotational speed for starting. When the initial energization is N phase, a driving pulse having a width which is shorter than that for N+1 phase energization is outputted. Thus the magnetism is made stronger so that the starting rotational speed is increased when performing either N+1 phase energization or N phase energization. The period for executing N phase energization is made shorter than that for N+1 phase energization, and the ratio of periods for N phase and N+1 phase energization is kept constant. By shortening the period for N phase energization and extending the period for N+1 phase energization, smooth and constant rotation is obtained.
摘要:
There are provided a nozzle capable of enhancing the straight-advancing capability of jetted fluid to increase the back wash effect of a filter member, and a filter-type dust collector capable of effectively carrying out dust removal from a filter member with such a nozzle. To this end, the nozzle has a Laval nozzle section secured to the inside of an outer tube at its proximal end and a fluid guide section disposed at the leading end of the outer tube. The fluid guide section has a plurality of suction holes elongated in the flowing direction of the pressurized fluid. This nozzle is mounted on a pulse header tube of a dust removal device.
摘要:
A crystalline semiconductor film in which the position and the size of crystal grains are controlled is provided, and a TFT that can operate at high speed is obtained by forming a channel formation region of the TFT from the crystalline semiconductor film. A heat retaining film is formed on an insulating surface, a semiconductor film is formed to cover the heat retaining film, and a reflective film is formed to partially cover the semiconductor film. The reflective films and the semiconductor film are irradiated with a laser beam. The reflective film creates a distribution in effective irradiation intensity of laser beam on the semiconductor film. The distribution, with the heat retaining effect provided by the heat retaining film, generates a temperature gradient in the semiconductor film. Utilizing these, the position where crystal nuclei are to be generated and the direction in which crystal growth should advance can be controlled and crystal grains having a large grain size can be obtained.
摘要:
A crystalline semiconductor film in which the position and the size of crystal grains are controlled is provided, and a TFT that can operate at high speed is obtained by forming a channel formation region of the TFT from the crystalline semiconductor film. A heat retaining film is formed on an insulating surface, a semiconductor film is formed to cover the heat retaining film, and a reflective film is formed to partially cover the semiconductor film. The reflective films and the semiconductor film are irradiated with a laser beam. The reflective film creates a distribution in effective irradiation intensity of laser beam on the semiconductor film. The distribution, with the heat retaining effect provided by the heat retaining film, generates a temperature gradient in the semiconductor film. Utilizing these, the position where crystal nuclei are to be generated and the direction in which crystal growth should advance can be controlled and crystal grains having a large grain size can be obtained.
摘要:
In a dot matrix type printer, a method of printing wherein successive lines are printed using a first and second plurality of print wires to print a first line in left to right and a second in right to left printing that is done in two passes over each line. When high-quality printing is required, all print wires are used in both passes with the print head being repositioned, at the start point of the first line by a feed direction adjustment to center the print wires between the previously printed dots, prior to the second pass over the two lines. The result is high-quality printed characters. In normal print, the odd print wires comprise the first plurality of print wires used in the first pass and the even print wire comprise the second plurality used in the second pass over the two lines.
摘要:
In a printed character printed with a printing apparatus provided with a plurality of type elements and a print hammer, the specified left or right edge portion thereof has ink adhered heavily on the paper, and this specified edge portion is difficult to be erased when erasing a wrongly printed character with a correction ribbon.In the disclosed character erasable printing apparatus, after moving the carriage from the print position by a predetermined minute distance in the printing direction or in its opposite direction toward the specified edge portion, a first hammering for erasure is carried out, and subsequently after moving the carriage in the direction opposite to above-described movement, at least, and without feeding the correction ribbon relative to the carriage, a second hammering for erasure is carried out with an unused fresh portion of the correction ribbon made to face the specified edge portion having residual ink.