A printer includes: a holding member configured to hold a roll of paper; an elastic member configured to support the holding member so that the holding member is slidable in a vertical direction; a first detection unit configured to detect a position of the holding member; and a second detection unit that detects a near-end of the roll of paper based on a detection result by the first detection unit.

An apparatus for manufacturing an electrode plate, includes an unwinder on which an electrode reel is installed; a meandering corrector correcting meandering of an electrode sheet unwound from the electrode reel; a press puncher disposed at a rear end of the meandering corrector; a cutter disposed at a rear end of the press puncher; a detector disposed between the press puncher and the cutter to acquire an image of the electrode sheet; and a controller connected to the detector and the meandering corrector.

A apparatus for processing sheets includes: a conveyance unit conveying a sheet; a processing unit provided with processing members processing the sheet along a conveyance direction, and a moving unit moving the processing members in a width direction; and a controller. When a processing position in the width direction to be processed by the processing members is different between a sheet conveyed ahead by the conveyance unit and a subsequent sheet, the controller processes the subsequent sheet by using a processing member having a minimum movement distance from the processing position of the sheet conveyed ahead among the processing members.

A sheet feeding device includes a detachable separation unit, a conveyance unit, a guide member, an urging member, and an opening and closing member. The feeding unit feeds a stored sheet. The separation unit separates sheets fed by the feeding unit one by one. The conveyance unit conveys the sheet. Urged by the urging member, the guide member guides the sheet toward the conveyance unit and rotates about a first rotating shaft. The opening and closing member opens and closes. In a state in which the opening and closing member is closed, the guide member is positioned in a first position in which the guide member forms a conveyance path. In a process in which the opening and closing member is opened, a free end of the guide member moves upwardly about the first rotating shaft, by using an urging force, from the first to a second position.

A sheet feeding device includes a first feeding roller pair, an upstream feeding roller pair, a downstream feeding roller pair, a second feeding roller pair, a first detecting portion, a second detecting portion, a third detecting portion, and a controller. The controller calculates a sheet feeding speed on the basis of a first time and a first distance. The controller calculates a length of the sheet with respect to the sheet feeding direction on the basis of the sheet feeding speed, a second time, and a second distance. The controller controls a sheet feeding timing by the second feeding roller pair on the basis of information of the length of the sheet.

A device for applying, around groups of two or more containers, a tape provided on one surface with adhesive without discontinuities, which comprises a carousel provided with plates shaped so that each one accommodates a group of containers to be wrapped together with the tape, a drum for cutting and transferring portions of tape of a length necessary to wrap each group, a roller for unwinding the tape for feeding the drum, a roller for preliminary unwinding of the tape from a reel, adapted to feed the unwinding roller with the interposition of a compensation buffer and a device for compensating the tension of the tape between the reel and the preliminary unwinding roller.

An edge detection unit is arranged in a conveying portion conveying a sheet and detects the edge of the sheet in the width direction perpendicular to the sheet conveying direction. A light source unit is arranged opposite the sheet. A detecting portion holder holds the edge detection unit and the light source unit. A conveying roller pair positions the sheet conveyed toward the edge detection unit. A unit housing houses the detecting portion holder and the conveying roller pair. The edge detection unit has a contact glass making contact with the sheet. The light source unit has a facing glass facing the contact glass. One glass out of the contact glass and the facing glass is inclined downward at a first angle with respect to the tangent line, which passes through the nip portion between the conveying roller pair, toward the downstream side in the sheet conveying direction.

A sheet supplying apparatus, in which a user can select either automatic sheet feeding or manual sheet feeding, includes a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction, a first sensor that detects a leading end portion of the sheet separated from an outer circumferential surface of the roll, a second sensor that detects the leading end portion which is manually set in a conveyance path by the user, and a determination unit configured to determine whether or not automatic sheet feeding is performed on the basis of a detection result of the second sensor.

A sheet feed apparatus comprises a tray, a pair of first guide sections, and a first optical sensor. The tray has a housing section for accommodating a plurality of sheets. The pair of first guide sections, arranged in the tray, sandwich the sheets in a direction perpendicular to a sheet conveyance direction. The first optical sensor provided above a bottom of the housing section in at least one of the first guide sections, is configured to detect one or more of uppermost sheets accommodated in the housing section.

A sheet feed apparatus comprises a tray, a pair of first guide sections, and a first optical sensor. The tray has a housing section for accommodating a plurality of sheets. The pair of first guide sections, arranged in the tray, sandwich the sheets in a direction perpendicular to a sheet conveyance direction. The first optical sensor provided above a bottom of the housing section in at least one of the first guide sections, is configured to detect one or more of uppermost sheets accommodated in the housing section.