Abstract: There is provided a device detecting curling of a sheet, the device including a first guide member carrying the sheet; a second guide member including a carriage path that is broader than the carriage path of the first guide member and accepting the curling of the sheet; and sensors with detection ranges into which a portion of the curling of the sheet enters, in the carriage path of the second guide member.

Abstract: According to an embodiment, a method for color erasing process includes the steps of: supplying a power to a heat source configured to heat a sheet having an image formed thereon using a color erasable material so as to cause heat generation as warming-up control; stopping the power supply to the heat source for a predetermined period of time in the warming-up control if the temperature of the heat source is increased starting from a temperature lower than a predetermined reference value that is lower than a color erasing temperature of the color erasable material and exceeds the predetermined reference value; performing maintenance control that is power supply control to maintain the temperature of the heat source at the target temperature; and performing, after the passage of the predetermined period of time, a color erasing process by the heat source.

Abstract: Provided is an alkali-free glass, which is substantially free of alkali metal oxides, and has a strain point of more than 680° C., an average coefficient of thermal expansion in the temperature range of 30 to 380° C. of 40 to 55×10?7/° C., and a liquidus temperature of less than 1,200° C. Further, the alkali-free glass comprises, as a glass composition in terms of mass %, 55 to 70% of SiO2, 10 to 20% of Al2O3, 0.1 to 4.5% of B2O3, 0 to 1% of MgO, 5 to 15% of CaO, 0.5 to 5% of SrO, and 5 to 15% of BaO.

Abstract: When the presence or absence of a malfunction is respectively determined in a decoloring section or a separation device, and it is determined that either the decoloring section or the separation device is malfunctioning, only the other is executable.

Abstract: An image erasing apparatus includes a scanning unit, a memory unit, an erasing unit, and a carrying unit. The scanning unit converts an image formed on a sheet into image data which is electronic data. The memory unit stores the image data converted by the scanning unit. The erasing unit erases the image formed on the sheet. The carrying unit carries the sheet to the scanning unit and the erasing unit in this order.

Abstract: Provided is an alkali-free glass, comprising, as a glass composition in terms of mass %, 58 to 70% of SiO2, 15.5 to 20% of Al2O3, 0 to 1% of B2O3, 0 to 5% of MgO, 3.5 to 16% of CaO, 0.5 to 6.5% of SrO, and 5 to 15% of BaO, being substantially free of alkali metal oxides, and having a strain point of more than 725° C.

Abstract: An image erasing apparatus includes: a paper feeding tray configured to feed a recording medium; a sensor group including a double-feed detection sensor configured to detect double feed of the recording medium and a media sensor configured to detect the thickness of the recording medium; a recording-medium collecting device, a collection box, or a discharge box configured to collect the recording medium; and a recording-medium conveying device connecting the paper feeding tray, the sensor group, and the recording-medium collecting device, the collection box, or the discharge box on a straight line.

Abstract: An image erasing apparatus includes: a first carrying section carrying a recording medium; a second carrying section carrying the recording medium; a branching section branching a carrying path into the first carrying section and the second carrying section; a first erasing section erasing an image of the recording medium in the first carrying section; a second erasing section erasing the image of the recording medium in the second carrying section; a third carrying section carrying the recording medium passing through the first erasing section to the second carrying section; and a control section selecting the carrying path of the recording medium depending on an image erasing mode.

Abstract: An image erasing apparatus includes: a first carrying section carrying a recording medium; a second carrying section carrying the recording medium; a branching section branching a carrying path into the first carrying section and the second carrying section; a first erasing section erasing an image of the recording medium in the first carrying section; a second erasing section erasing the image of the recording medium in the second carrying section; a third carrying section carrying the recording medium pas sing through the first erasing section to the second carrying section; and a control section selecting the carrying path of the recording medium depending on an image erasing mode.

Abstract: A communication unit transmits image data of a preceding sheet scanned to a management device communicating with a decoloring device and receives from a management device determination data which is produced by the management device based on the image data and indicates at least whether or not the preceding sheet is reusable and receives ability data of the management device or reception time indication data. A control unit conveys the preceding sheet to a predetermined conveyance destination based on the determination data and feeds sheets at a timing at which the leading end of a following sheet does not run into the tail end of the preceding sheet even if the preceding sheet is held until the determination data is received based on the ability data or the reception time indication data.

Abstract: According to one embodiment of the present invention, an erasing apparatus includes a used sheet stacking tray, an image erasing unit, a stand-by tray, a stand-by tray driving unit, and an erased sheet stacking tray. The used sheet stacking tray stacks thereon a used sheet on which an image is formed using an erasable colorant of which a color is erased by a predetermined heating process. The image erasing unit performs the heating for the used sheet which is received one by one from the used sheet stacking tray and discharges an erased sheet from which the image formed on the used sheet is erased. The stand-by tray has a mechanism which can be driven in a predetermined direction and places thereon the erased sheet discharged by the image erasing unit. The stand-by tray driving unit drives the stand-by tray and enables the erased sheet to free-drop. The erased sheet stacking tray is disposed under the stand-by tray and stacks thereon the erased sheet which free-drops from the stand-by tray.

Abstract: An image delete apparatus has a paper feed tray that feeds recording media, a group of sensors containing a double-feed detection sensor that senses double-feed of the recording media and a media sensor that senses thicknesses of the recording media, a folding unit, and an auxiliary carrying path, and includes a collecting unit that folds and collects the recording media.

Abstract: According to one embodiment, a sheet conveying apparatus includes: a guide section that forms a one side guide surface of a sheet conveying path, the guide section having a first guide member and a second guide member which are continuously arranged from a conveying direction upstream side to a conveying direction downstream side, at least one of the first guide member and the second guide member being a guide member that rotates to open and close; and a joint section that forms an uneven joint with a conveying direction downstream side end of the first guide member and a conveying direction upstream side end of the second guide member, the downstream side end of the first guide member being arranged further on an inner side than the upstream side end of the second guide member with respect to the sheet conveying path if at least one of the first guide member and the second guide member is closed.

Abstract: According to one embodiment, an erasing apparatus including a recording medium removing apparatus includes: a thickness sensor configured to change an output signal according to the thickness of a recording medium; a recording medium conveying mechanism configured to convey the recording medium; a recording medium removing mechanism provided downstream in a recording medium conveying direction of the thickness sensor and configured to remove the recording medium in a direction perpendicular to the recording medium conveying direction; a control unit configured to remove, if the control unit determines that the recording medium is unconveyable, the recording medium from a recording medium conveying path with the recording medium removing mechanism; and a heating roller configured to heat the recording medium to temperature equal to or higher than erasing temperature.

Abstract: There is provided a decoloring apparatus including: an image reading unit; a decoloring processing unit; a transmission unit which transmits image data read by the image reading unit to a predetermined management apparatus; a receiving unit which receives a result of determination processing performed on the side of the management apparatus for the sheet from which the image data was read, based on the image data transmitted by the transmission unit; and a transport control unit which controls sheet transport time intervals for secondly or later transported sheets based on a time period from transmission of the image data of a firstly transported sheet by the transmission unit until receiving of the determination result for the firstly transported sheet by the receiving unit if the image reading unit is caused to sequentially read images on three or more sheets.

Abstract: According to one embodiment, an erasing apparatus including a recording medium removing apparatus includes: a thickness determining unit configured to determine whether the thickness of a recording medium is equal to or larger than a first threshold, a conveyance guide forming a conveying path for the recording medium; a conveyance guide displacing device configured to lift the conveyance guide if the thickness determining device determines that the thickness of the recording medium is equal to or larger than the first threshold, and a removing mechanism configured to remove, from a recording medium conveying path, the recording medium determined as unconveyable.

Abstract: A decoloring apparatus includes a conveyance path, a paper feeding part, a reading part, a communication part, a decoloring part and a control part. The conveyance path conveys a sheet to respective parts in the apparatus. The paper feeding part feeds a sheet on which an image is formed by a decolorable colorant to the conveyance path from a sheet stack part. The reading part is provided downstream of the paper feeding part in the conveyance path and reads the image of the sheet. The communication part transmits read image data of a preceding sheet to a management apparatus communicably connected to the decoloring apparatus and receives a determination result of a conveyance destination of the preceding sheet obtained by the management apparatus based on the image data. The decoloring part is provided downstream of the reading part in the conveyance path and erases the image of the sheet.

Abstract: According to one embodiment, an erasing apparatus includes: a recording medium sorting apparatus including a first conveyance guide having a curvature radius smaller than curvature radiuses of all curved surfaces present in a downstream direction in a recording medium conveying path, a second conveyance guide forming the recording medium conveying path in conjunction with the first conveyance guide and set to be capable of opening and closing the recording medium conveying path, and a displacing device configured to open and close the second conveyance guide; and a control unit. If the control unit determines that a jam occurs in the recording medium sorting apparatus, the control unit opens the second conveyance guide to collect a recording medium that causes the jam.

Abstract: An image erasing apparatus includes: a first carrying section carrying a recording medium; a second carrying section carrying the recording medium; a branching section branching a carrying path into the first carrying section and the second carrying section; a first erasing section erasing an image of the recording medium in the first carrying section; a second erasing section erasing the image of the recording medium in the second carrying section; a third carrying section carrying the recording medium passing through the first erasing section to the second carrying section; and a control section selecting the carrying path of the recording medium depending on an image erasing mode.

Abstract: An image erasing apparatus includes: a paper feeding tray configured to feed a recording medium; a sensor group including a double-feed detection sensor configured to detect double feed of the recording medium and a media sensor configured to detect the thickness of the recording medium; a recording-medium collecting device, a collection box, or a discharge box configured to collect the recording medium; and a recording-medium conveying device connecting the paper feeding tray, the sensor group, and the recording-medium collecting device, the collection box, or the discharge box on a straight line.