Provided is a printing apparatus for performing printing on a sheet drawn out from a roll including: a roll holding unit configured to hold the roll; a support unit configured to rotatably support the roll holding unit; a core portion provided to the roll holding unit and configured to be inserted into a hollow portion of a core pipe of the roll from an end portion of the core pipe to extend along an axis of the core pipe; a contact member provided to the core portion and configured to be put in contact with an inner wall surrounding the hollow portion of the core pipe; and a cam member disposed inside the core portion and configured to pivot to a first position where the contact member is pressed onto the inner wall and to a second position where the contact member is retracted from the inner wall.

An image reading apparatus includes a base unit, a conveyance roller to convey a sheet, a reading unit, an openable cover having a first contact portion, a guide member having a second contact portion, and an urging member. The guide member is rotatable between a first position where the reading unit is covered and a second position where the reading unit is exposed. The urging member urges the guide member in a direction from the first position toward the second position. During closing of the openable cover, the first contact portion presses the second contact portion and the guide member moves against an urging force of the urging member. A position of the guide member in a rotation direction in a state in which the openable cover is closed is determined by the first contact portion and the second contact portion coming into contact with each other.

A reversing device for a film web, which has a take-off device, has at least one turning device and at least one deflecting roller. The film web can be guided by the take-off device via the at least one turning device and the at least one deflecting roller to a winding device. The axes of the take-off device, the at least one turning device, and the at least one deflecting roller are adjustable in angle relative to one another. The at least one deflecting roller is formed as an expander roller having an expanding capacity which increases towards the end faces of the deflecting roller.

Provided is a printing apparatus for performing printing on a sheet drawn out from a roll including: a roll holding unit configured to hold the roll; a support unit configured to rotatably support the roll holding unit; a core portion provided to the roll holding unit and configured to be inserted into a hollow portion of a core pipe of the roll from an end portion of the core pipe to extend along an axis of the core pipe; a contact member provided to the core portion and configured to be put in contact with an inner wall surrounding the hollow portion of the core pipe; and a cam member disposed inside the core portion and configured to pivot to a first position where the contact member is pressed onto the inner wall and to a second position where the contact member is retracted from the inner wall.

An image reading apparatus includes a base unit, a conveyance roller to convey a sheet, a reading unit, an openable cover having a first contact portion, a guide member having a second contact portion, and an urging member. The guide member is rotatable between a first position where the reading unit is covered and a second position where the reading unit is exposed. The urging member urges the guide member in a direction from the first position toward the second position. During closing of the openable cover, the first contact portion presses the second contact portion and the guide member moves against an urging force of the urging member. A position of the guide member in a rotation direction in a state in which the openable cover is closed is determined by the first contact portion and the second contact portion coming into contact with each other.