摘要:
An image forming apparatus including: guide portions provided in strips on opposite ends of an inner circumferential surface of an endless belt; a driving roller supporting the endless belt; a driven roller supporting the endless belt; first restriction members having first contact surfaces which come into contact with the guide portions when the endless belt moves in a belt width direction; and second restriction members having second contact surfaces which come into contact with the guide portions when the endless belt moves in the belt width direction, the second contact surfaces are placed nearer to a center in the belt width direction than the first contact surfaces, and an angle between the first contact surfaces and the inner circumferential surface in the belt width direction is larger than an angle between the second contact surfaces and the inner circumferential surface in the belt width direction.
摘要:
A belt unit used for an image forming apparatus is provided. The belt unit includes a rotatable endless belt, a plurality of stretching members configured to stretch the belt, an urging member, and a contact and separation unit configured to be able to switch a position of the stretching member urged by the urging member. In moving the stretching member urged by the urging member from the separation position to the contact position, the contact and separation unit makes one end side of the stretching member urged by the urging member in a longitudinal direction coming into contact with the inner surface of the belt faster than the other end side, and temporarily decreases the movement speeds of the both ends of the stretching member in the longitudinal direction respectively before arriving at the contact position.
摘要:
An image forming apparatus including: guide portions provided in strips on opposite ends of an inner circumferential surface of an endless belt; a driving roller supporting the endless belt; a driven roller supporting the endless belt; first restriction members having first contact surfaces which come into contact with the guide portions when the endless belt moves in a belt width direction; and second restriction members having second contact surfaces which come into contact with the guide portions when the endless belt moves in the belt width direction, the second contact surfaces are placed nearer to a center in the belt width direction than the first contact surfaces, and an angle between the first contact surfaces and the inner circumferential surface in the belt width direction is larger than an angle between the second contact surfaces and the inner circumferential surface in the belt width direction.
摘要:
A belt unit used for an image forming apparatus is provided. The belt unit includes a rotatable endless belt, a plurality of stretching members configured to stretch the belt, an urging member, and a contact and separation unit configured to be able to switch a position of the stretching member urged by the urging member. In moving the stretching member urged by the urging member from the separation position to the contact position, the contact and separation unit makes one end side of the stretching member urged by the urging member in a longitudinal direction coming into contact with the inner surface of the belt faster than the other end side, and temporarily decreases the movement speeds of the both ends of the stretching member in the longitudinal direction respectively before arriving at the contact position.
摘要:
An image forming apparatus includes an image bearing member; a rotatable intermediary transfer member; first transfer member; a second transfer member toner images transferred and superposed on the intermediary transfer member onto a transfer material at a second transfer position; a charging member provided downstream of the second transfer position and upstream of the first transfer position; a first voltage source portion for applying a voltage to the charging member; a charging brush provided downstream of the second transfer position and upstream of the charging member with respect to the rotational moving direction; and a second voltage source portion for applying a voltage to the charging brush, wherein second voltage source portion is capable of applying voltage to the charging brush in a state that a voltage is applied to the charging member by first voltage source portion; and a regulating member, provided between the charging member and the charging brush with respect to the rotational moving direction, for regulating a position of a brush of the charging brush.
摘要:
A reticle defect inspection apparatus that can carry out a defect inspection with high detection sensitivity are provided. The apparatus includes an optical system of transmitted illumination for irradiating one surface of a sample with a first inspection light, an optical system of reflected illumination for irradiating another surface of the sample with a second inspection light, and a detecting optical system that can simultaneously detect a transmitted light obtained by the first inspection light being passed through the sample and a reflected light obtained by the second inspection light being reflected by the sample. And the optical system of transmitted illumination includes a focusing lens driving mechanism for correcting a focal point shift of the transmitted light resulting from thickness of the sample.
摘要:
A mask-defect inspection apparatus including a plurality of illumination optical systems (2) for illuminating different areas (14a, 14b) on a mask (4) on which a pattern (6) is formed, an objective lens (OL) disposed to face the mask, and at least a pair of detection optical systems (15, 16) each having a detection sensor (17, 19) to form an image of the pattern and for receiving illumination light from each of the different areas through the objective lens, each of the detection optical systems having a mechanism (18a, 20a) for adjusting an angle of an aperture.
摘要:
An image forming apparatus for forming an image on a recording material includes a cartridge, a main assembly including a positioner positioning the cartridge and an urger urging the cartridge to the positioner, a mover supporting the cartridge and movable between a pulled out position outside of the main assembly and an inside position inside the main assembly, and a gripper mounted to the mover and movable between a reference position and an outward position located outwardly with respect to the pull out direction of the mover. When the mover is at the inside position, the cartridge is positioned to the positioner by the urger to be placed in a positioning state when the gripper is at the reference position and the positioning state of the cartridge is released by moving the gripper from the reference position to the outward position.
摘要:
A pattern inspection apparatus uses a die-to-database comparison method which compares detected pattern data obtained from an optical image of a pattern of a plate to be inspected with first reference pattern data obtained from designed pattern data in combination with a die-to-die comparison method which compares the detected pattern data with second reference pattern data obtained by detecting an area to be a basis for repetition. A computer detects presence of a plurality of repeated pattern areas from layout information contained in the designed pattern data, reads the arrangement, the number, the dimension and the repeated pitch of the repeated pattern areas, and automatically fetches an inspection area of the die-to-die comparison method.