Abstract: A lighting device (23) irradiates a web under conveyance with light. The lighting device includes a light source (43), and an irradiation port (61) configured to open linearly in a widthwise direction of the web at an end portion facing the web. The irradiation port (61) is formed between first and second parallel portions (62b, 63b) where a first plate member (62) and a second plate member (63) parallelly face each other. The web under conveyance is irradiated with linear light. It is possible to provide a lighting device capable of irradiating only an inspection region of a sheet or a web with light.

Abstract: A lighting device (23) irradiates a web under conveyance with light. The lighting device includes a light source (43), and an irradiation port (61) configured to open linearly in a widthwise direction of the web at an end portion facing the web. The irradiation port (61) is formed between first and second parallel portions (62b, 63b) where a first plate member (62) and a second plate member (63) parallelly face each other. The web under conveyance is irradiated with linear light. It is possible to provide a lighting device capable of irradiating only an inspection region of a sheet or a web with light.

Abstract: A preform is obtained by stacking two or more prepreg cut materials, each of which is obtained by cutting a sheet-like prepreg into an outline of a predetermined shape, and the sheet-like prepreg being formed of a matrix resin and reinforcing fibers aligned in one direction. This preform is characterized in that at least one prepreg cut material has first incisions that are regularly distributed throughout the whole in-plane region and a second incision that is longer than the first incision while being provided only in a predetermined specific region.

Abstract: A lighting device (23) irradiates a web under conveyance with light. The lighting device includes a light source (43), and an irradiation port (61) configured to open linearly in a widthwise direction of the web at an end portion facing the web. The irradiation port (61) is formed between first and second parallel portions (62b, 63b) where a first plate member (62) and a second plate member (63) parallelly face each other. The web under conveyance is irradiated with linear light. It is possible to provide a lighting device capable of irradiating only an inspection region of a sheet or a web with light.

Abstract: To measure a thickness or a coverage of a resin present at a surface layer of a prepreg in a non-contact manner using a simple technique, a measurement method for a resin state which is a method for measuring a state of a resin present at a surface layer of a prepreg impregnated with the resin in an unidirectional reinforced fiber base material includes: irradiating the surface layer of the prepreg with light from an irradiation source; receiving reflected light from the surface layer of the prepreg by a sensor; and calculating at least one of a thickness or a coated state of the resin present at the surface layer of the prepreg from intensity of the reflected light.

Abstract: A method of producing a fiber-reinforced resin by press-molding a prepreg preform contains a reinforcing fiber and a thermosetting resin, the method including (a) a preform production step of producing a preform; (b) a placement and preheating step of placing the preform in a mold and preheating the preform; (c) a pressing step of changing the preform into a product shape; and (d) a curing step of curing the preform while pressurizing the preform, wherein, at start of the pressing step (c), a degree of cure ?e of the thermosetting resin in a specific part of the preform is higher than a degree of cure ?i of the thermosetting resin in a region other than the specific part of the preform.

Abstract: A preform element has a tucked portion in at least a portion of a prepreg composed of a reinforced fiber and a thermosetting resin. The preform element, a preform using the same, and a method of producing the same, provide for the preform element to have excellent mechanical properties or filling characteristics with respect to a cavity and is effective in avoiding problems such as fiber bridging or resin richness or warping, even when a three-dimensional form having thickness variations such as thick parts or projections is obtained through a press molding.

Abstract: A prepreg is formed by impregnating reinforcing fibers with a heat-curable resin with a cure extent greater than or equal to 3% and less than 50%, chopped prepreg obtained by cutting the prepreg is dispersed in a flat shape, and the chopped prepreg is thermally bonded together to form a fiber reinforced resin sheet. The fiber reinforced resin sheet can be used in press forming, has excellent uniformity of basis weight as a forming material allowing dense filling into a mold, and enables obtaining a shaped product that has excellent mechanical characteristics because of increased volume content of the reinforcing fibers.

Abstract: A method for adjusting color tones of a printed matter includes: a displaying step of displaying an image of a printed matter on a display apparatus (119) by plate data used when a pattern is printed on a printing plate used in printing performed by a printing press; an adjusting step in which an operator adjusts the color tones of the printed matter while referring to the printed matter displayed on the display apparatus (119); and a reference-image displaying step of displaying a reference image of displaying an image of a printed matter obtained when a supply amount of ink used in the printing is adjusted, for reference. In the adjusting step, the operator adjusts the color tones of the printed matter based on the supply amount of the ink in the printing press while referring to the image of the printed matter displayed in the reference-image displaying step.

Abstract: In a printed product color misregister amount detection method, a reference register mark including a first color area portion with a predetermined width and a blank portion in contact with the first color area portion is printed in a reference color on a printed product to be printed by a multi-color printing press. A positional shift detection register mark including a second color area portion with a width smaller than that of the first color area portion of the reference register mark is printed in a color other than the reference color to have as a target position a position where the width of the second color area portion falls within the width of the first color area portion of the reference register mark.

Abstract: Provided is a method for adjusting color tones of a printed matter. The method includes a displaying step of displaying an image of a printed matter on a display apparatus (119) by use of plate data used when a pattern is printed on a printing plate used in printing performed by a printing press, and an adjusting step in which an operator adjusts the color tones of the printed matter while referring to the printed matter displayed on the display apparatus (119). The method for adjusting color tones of a printed matter includes a reference-image displaying step of displaying a reference image of displaying an image of a printed matter obtained when a supply amount ink used in the printing is adjusted, for reference. In the adjusting step, the operator adjusts the color tones of the printed matter on the basis of the supply amount of the ink in the printing press while referring to the image of the printed matter displayed in the reference-image displaying step.

Abstract: In a printed product color misregister amount detection method, a reference register mark including a first color area portion with a predetermined width and a blank portion in contact with the first color area portion is printed in a reference color on a printed product to be printed by a multi-color printing press. A positional shift detection register mark including a second color area portion with a width smaller than that of the first color area portion of the reference register mark is printed in a color other than the reference color to have as a target position a position where the width of the second color area portion falls within the width of the first color area portion of the reference register mark.