Abstract: An object of the present invention is to provide a visual acuity test apparatus capable of displaying all test symbols provided for each test value by one test apparatus without using a visual acuity chart in which Landolt rings and characters of each country arranged in order according to a test value are displayed on a paper medium or an electric bulletin board, a test symbol card for optometry carried in hand, a precision machine or the like in combination.

Abstract: According to one embodiment, a heating device includes a cylindrical belt, a heat generating member, and a support member. The heat generating member is disposed in an interior region surrounded by the belt and in contact with an inner peripheral surface of the belt. The support member is provided in the interior region surrounded by the belt and contacts and supports the heat generating member.

Abstract: According to one embodiment, there is provided a cutting device including a cutting section configured to cut a conveyed long cloth medium into a predetermined length, a placement surface for placing the cloth medium cut by the cutting section, and a paddle section attached to a rotation shaft that is rotatable in a conveyance direction of the cloth medium, configured to come into contact with the placement surface by rotating around the rotation shaft, and configured to scrape out the cloth medium in the conveyance direction.

Abstract: According to one embodiment, a printer device includes regulating members provided in a conveyance path of paper or an accommodation unit of the paper, and regulating side edges of the paper in a width direction and having a variable regulating width, a detection unit configured to detect a paper width of the paper based on the regulating width of the regulating members, and a processor. The processor is configured to store the paper width detected by the detection unit in a storage unit, control printing of the paper in the width direction based on the paper width stored in the storage unit, and update the paper width stored in the storage unit according to a variation in the paper width if the paper width newly detected by the detection unit is varied from the paper width stored in the storage unit.

Abstract: A label printer for printing on a label sheet that is stored in a rolled shape and includes a base sheet and a plurality of labels attached thereon, includes a platen roller configured to convey the label sheet, a head configured to print on a label of the conveyed label sheet, a peeling bar by which the printed label is peeled off from the base sheet, a winding shaft configured to rotate to wind thereon the base sheet from which the printed label has been peeled off, and a support member configured to pivot around an axis at a first end thereof and biased to press with a second end thereof the base sheet wound around the winding shaft.

Abstract: According to one embodiment, a heating device includes a belt and a contact member. The belt has a tubular shape. The contact member is provided inside the belt. The contact member is formed in an arc shape along the inner peripheral surface of the belt. The contact member is slidably in contact with the inner peripheral surface of the belt. When the amount of deflection of the belt is D, the radius of curvature of the inner peripheral surface of the belt is A, and the radius of curvature of the outer peripheral surface of the contact member is B, the following equations (1) and (2) are satisfied: D?10 mm??(1) 0.4 mm?A?B?0 mm??(2).

Abstract: According to one embodiment, a heating device includes a cylindrical belt, a heat generating member, and a support member. The heat generating member is disposed in an interior region surrounded by the belt and in contact with an inner peripheral surface of the belt. The support member is provided in the interior region surrounded by the belt and contacts and supports the heat generating member.

Abstract: According to one embodiment, a heating device includes a cylindrical belt, a heat generating member, and a support member. The heat generating member is disposed in an interior region surrounded by the belt and in contact with an inner peripheral surface of the belt. The support member is provided in the interior region surrounded by the belt and contacts and supports the heat generating member.

Abstract: To provide a photopolymerization sensitizer which will not cause problems of dusting or coloring of a cured product by bleeding of additives such as the photopolymerization sensitizer on the surface e.g. by blooming at the time of photo-curing or during storage of the cured product, and which imparts a practically sufficient photo-curing rate. An oligomer of a 9,10-bis(substituted oxy)anthracene compound having repeating units represented by the following formula (1): wherein n represents a repetition number and is from 2 to 50, each of X and Y which may be the same or different, is a hydrogen atom, a C1-8 alkyl group or a halogen atom, and A is a bivalent substituent.

Abstract: According to one embodiment, a heating device includes a belt and a contact member. The belt has a tubular shape. The contact member is provided inside the belt. The contact member is formed in an arc shape along the inner peripheral surface of the belt. The contact member is slidably in contact with the inner peripheral surface of the belt. When the amount of deflection of the belt is D, the radius of curvature of the inner peripheral surface of the belt is A, and the radius of curvature of the outer peripheral surface of the contact member is B, the following equations (1) and (2) are satisfied: D?10 mm??(1) 0.4 mm?A?B?0 mm??(2).

Abstract: According to one embodiment, a fixing device fixes a toner image formed on a medium to the medium. The fixing device includes a heating rotator which is rotatably supported, an auxiliary heating member which is disposed along an inner circumferential surface of the heating rotator, and swings as the heating rotator rotates, a lubricant supply member which is disposed at a position on which the swing auxiliary heating member abuts, and is impregnated with a lubricant, and a pressing rotator which abuts on the heating rotator, and forms a nip portion through which the medium passes.

Abstract: A fixing device that fixes a toner image to a medium, includes: a heating body rotatably supported; an auxiliary heating member disposed along an inner surface of the heating rotation body; a temperature sensor facing the inner surface via the auxiliary heating member; a first elastic body configured to press, via a first force, the temperature sensor against the inner surface; and a second elastic body configured to press, via a second force, a sliding member against the inner surface. A product of a distance from a center of the auxiliary heating member to the first elastic body and the first elastic force is equal to a product of a distance from the center to the second elastic body and the second elastic force.

Abstract: A heating device for an image forming unit includes a heater unit, a cylindrical film, a support member, a first heat transfer unit, and a second heat transfer unit. The cylindrical film is at least partially disposed around the heater unit. The support member is configured to support the heater unit above the cylindrical film and such that the heater unit is located between the support member and the cylindrical film. The first heat transfer unit is disposed between the cylindrical film and the heater unit and in confronting relation with a first surface of the heater unit. The first heat transfer unit has a first contact area with the heater unit. The second heat transfer unit is disposed between the heater unit and the support member and in confronting relation with a second surface of the heater unit. The second surface is opposite the first surface.

Abstract: According to one embodiment, a heating device includes a belt and a heat generating member. The belt has a tubular shape. The heat generating member is provided inside the belt. The heat generating member is formed in an arc shape along the inner peripheral surface of the belt. The heat generating member is slidably in contact with the inner peripheral surface of the belt. When the amount of deflection of the belt is D, the radius of curvature of the inner peripheral surface of the belt is A, and the radius of curvature of the outer peripheral surface of the heat generating member is B, the following equations (1) and (2) are satisfied: D?10 mm??(1) 0.4 mm?A?B?0 mm??(2).

Abstract: According to one embodiment, a heating device includes a belt and a heat generating member. The belt has a tubular shape. The heat generating member is provided inside the belt. The heat generating member is formed in an arc shape along the inner peripheral surface of the belt. The heat generating member is slidably in contact with the inner peripheral surface of the belt. When the amount of deflection of the belt is D, the radius of curvature of the inner peripheral surface of the belt is A, and the radius of curvature of the outer peripheral surface of the heat generating member is B, the following equations (1) and (2) are satisfied: D?10 mm??(1) 0.4 mm?A?B?0 mm??(2).

Abstract: According to one embodiment, a heating device includes a cylindrical belt, a heat generating member, and a support member. The heat generating member is disposed in an interior region surrounded by the belt and in contact with an inner peripheral surface of the belt. The support member is provided in the interior region surrounded by the belt and contacts and supports the heat generating member.

Abstract: To provide a photopolymerizable composition which can be quickly cured by light of from 300 nm to 450 nm, and a cured product of which is less colored. A photopolymerization sensitizer composition containing a compound represented by the following formula (1) and a compound, of which the maximum value of an absorption coefficient in a wavelength region ranging from at least 400 nm to at most 500 nm is higher than the maximum value of an absorption coefficient in a wavelength region ranging from at least 400 nm to at most 500 nm of said compound; and a photopolymerizable composition containing the photopolymerization sensitizer composition.

Abstract: A heating device for an image forming unit includes a heater unit, a cylindrical film, a support member, a first heat transfer unit, and a second heat transfer unit. The cylindrical film is at least partially disposed around the heater unit. The support member is configured to support the heater unit above the cylindrical film and such that the heater unit is located between the support member and the cylindrical film. The first heat transfer unit is disposed between the cylindrical film and the heater unit and in confronting relation with a first surface of the heater unit. The first heat transfer unit has a first contact area with the heater unit. The second heat transfer unit is disposed between the heater unit and the support member and in confronting relation with a second surface of the heater unit. The second surface is opposite the first surface.

Abstract: According to one embodiment, a fixing device fixes a toner image formed on a medium to the medium. The fixing device includes a heating rotator which is rotatably supported, an auxiliary heating member which is disposed along an inner circumferential surface of the heating rotator, and swings as the heating rotator rotates, a lubricant supply member which is disposed at a position on which the swing auxiliary heating member abuts, and is impregnated with a lubricant, and a pressing rotator which abuts on the heating rotator, and forms a nip portion through which the medium passes.

Abstract: A fixing device that fixes a toner image to a medium, includes: a heating body rotatably supported; an auxiliary heating member disposed along an inner surface of the heating rotation body; a temperature sensor facing the inner surface via the auxiliary heating member; a first elastic body configured to press, via a first force, the temperature sensor against the inner surface; and a second elastic body configured to press, via a second force, a sliding member against the inner surface. A product of a distance from a center of the auxiliary heating member to the first elastic body and the first elastic force is equal to a product of a distance from the center to the second elastic body and the second elastic force.