Abstract: An image reading apparatus includes an optical unit for reading the image information by scanning and irradiating the photostimulable phosphor plate with the excitation light from a light source and converging photo-stimulated luminescence light emitted from the photostimulable phosphor plate to conduct photoelectric conversion, a base table, a linear motor for moving the optical unit with respect to the base table, a wire fixed on the base table at both ends of the wire, a pulley rotatably fixed on the optical unit for being rotated by relative movement between the pulley and the wire caused by the movement of the optical unit, a rotary encoder for detecting a rotational speed of the pulley; and a control section for controlling the linear motor based on a detection result of the rotary encoder, wherein the wire is wound not less than one turn around the pulley and inclined at a predetermined angle against a line crossing a rotational axis of the pulley at right angle.

Abstract: A radiation image reading apparatus includes an image reading section for reading a radiation image on a stimulable phosphor sheet by scanning the stimulable phosphor sheet with exciting light in a main scanning direction, and a conveying section having a windable member to hold the stimulable phosphor sheet, a supporting member to support the windable member, and a driving section to move the windable member so as to convey the stimulable phosphor sheet to the image reading section in a sub scanning direction. The apparatus further includes a vibration damping mechanism being in contact with the windable member to damp vibration of the windable member, and a vibration refraining mechanism being in contact with the vibration damping mechanism to refrain vibration of the vibration damping mechanism itself.

Abstract: The image reading apparatus is providing with an optical unit 1 that illuminates the stimulable phosphor plate P with excitation light L1 from the light source while scanning it and reads the image information by condensing the photo-stimulated luminescence light emitted from the stimulable phosphor plate P and carrying out photoelectric conversion of this light, and a linear motor 7 that moves the stimulable phosphor plate P. In addition, it is provided with connecting means 6 and 61 that travel along with the stimulable phosphor plate P, a rotating device 92 and 93 that rotates due to the movement of the stimulable phosphor plate P transmitted via the connecting means 6 and 61, a rotation detecting device 5 that detects the rotational speed of the rotating device 92 and 93, and a speed control section 100 that controls the linear motor 7 by comparing the result of detection by the rotation detecting device 5 with a previously determined set speed.

Abstract: A radiation image reading apparatus includes an image reading section for reading a radiation image on a stimulable phosphor sheet by scanning the stimulable phosphor sheet with exciting light in a main scanning direction, and a conveying section having a windable member to hold the stimulable phosphor sheet, a supporting member to support the windable member, and a driving section to move the windable member so as to convey the stimulable phosphor sheet to the image reading section in a sub scanning direction. The apparatus further includes a vibration damping mechanism being in contact with the windable member to damp vibration of the windable member, and a vibration refraining mechanism being in contact with the vibration damping mechanism to refrain vibration of the vibration damping mechanism itself.

Abstract: An image reading/forming device to read/form an image by moving a moving object including either a stimulative flourescent substance sheet on which the image is recorded or a reading/recording section to read/record the image, to the other. The image reading/forming device including a guide member to guide the moving object and a linear motor to move the moving object, the linear motor comprises of a magnet section formed into a shaft-like style having plural magnets extending in the moving direction and a movable coil to straightly moving the moving object. And the linear motor and the guide member are arranged in a row along the direction perpendicular to the moving direction of the moving object.

Abstract: A magnetic recording medium is disclosed which comprises a first magnetic layer on a nonmagnetic support and a second magnetic layer on the first magnetic layer.The first magnetic layer contains A parts by weight of at least one of Si and Al per 100 parts by weight of magnetic materials, and the second magnetic layer contains B parts by weight of at least one of Si and Al per 100 parts by weight of magnetic materials, wherein A is smaller than B.This magnetic recording medium is characterized in that: the magnetic recording medium does not stain the conveyance rollers in the manufacturing process; problems which tend to occur when running conventional tapes are greatly reduced; and it is suitable for use as a video tape.

Abstract: An extruder for coating magnetic layers onto electro-magnetic recording tape is disclosed, which is provided with two reservoirs and two outlet channels so as to permit simultaneous coating of two layers. The two outlet channels meet at an angle and merge into a single outlet channel, which extrudes the two layers between a front edge and a rear edge. The front edge has a shape of curvature, and the rear edge protrudes beyond a tangential line drawn from the end of the front edge curvature. The extruder is capable of producing double layered magnetic tape with or without a mixed zone between layers.

Abstract: A coating apparatus having a first slot between its front and center edges and a second slot between its center and back edges, wherein a coating solution is extruded continuously from each of the slots onto the surface of a flexible support running continuously along the edge surfaces of the front, center, and back edges in that order.The front edge surface has a straight-line portion on at least the terminal end portion of the front edge so that the straight-line portion extends along the direction of movement of the support and is not longer than one mm, and at least one portion of the center and back edge surfaces protrudes from the extension line of the straight-line toward the support.The coating apparatus is suitable for preparing magnetic recording media.

Abstract: A magnetic recording medium which has improved electromagnetic conversion characteristics and running ability and is suitable for high-density recording. The magnetic recording medium has at least two magnetic layers which are provided on one side of a support. One of said magnetic layers contains magnetic particles having an aspect ratio of from 3 to less than 8 and the other one contains magnetic particles having an aspect ration of from 8 to 12.

Abstract: A magnetic recording medium improved in the magnetic recording characteristics, running properties and durability is disclosed. The magnetic recording medium comprises a non-magnetic support having on a side of the support an upper magnetic layer positioned farther from the support and a lower magnetic layer positioned closer to the support. The upper magnetic layer comprises a binder, a magnetic powder having an original BET specific surface area of not less than than 30 m.sup.2 /g and at least one abrasive selected from alumina, silicon carbide, Cr.sub.2 O.sub.3, silica, .alpha.-Fe.sub.2 O.sub.3, TiO.sub.2 and zilconia in a portion of 3 to 20 parts per 100 parts by weight of the magnetic powder, and the lower magnetic layer comprises a binder and a magnetic powder having an original BET specific surface area of less than 30 m.sup.2 /g, and kinds of the binders each contained in the upper magnetic layer and the lower magnetic layer are the same.

Abstract: A magnetic recording medium having plural magnetic layers is disclosed. The uppermost magnetic layer contains an abrasive with an average particle diameter of not more than 0.3 .mu.m, and a magnetic layer other than the uppermost magnetic layer contains an abrasive with an average particle diameter of not less than 0.3 .mu.m. The medium is improved in the electromagnetic conversion characteristics and sliding noise.