Abstract: A sheet feeding apparatus includes: a multiple-feed detecting section that detects recording sheets to be transported by plural rolls in a direction; a separating section that separates an uppermost sheet of the recording sheets from the other; a slippage detecting section that detects a slippage of the uppermost recording sheet with respect to a roll; and a transporting-speed reduction suppressing section that suppresses a transporting-speed of the uppermost recording sheet from reducing from a value, the separation section including: a transporting roll that transports recording sheets in a transporting direction; and a separation roll that is placed to be opposed to and to be press-contacted with the transporting roll through a recording sheet, the transporting-speed reduction suppressing section changing a separation torque of the separation roll according based on a result of detection by the multiple-feed detecting section and a result of detection by the slippage detecting section.

Abstract: A measuring device, wherein a feed-out member feeds out an uppermost one of plural sheet-shaped materials stacked on a base by rotating in contact with the uppermost sheet-shaped material, has a detector that detects a force imparted to the base and the sheet-shaped materials not in contact with the feed-out member, the force being generated by feeding-out the uppermost sheet-shaped material.

Abstract: A sheet feeding apparatus includes: a multiple-feed detecting section that detects recording sheets to be transported by plural rolls in a direction; a separating section that separates an uppermost sheet of the recording sheets from the other; a slippage detecting section that detects a slippage of the uppermost recording sheet with respect to a roll; and a transporting-speed reduction suppressing section that suppresses a transporting-speed of the uppermost recording sheet from reducing from a value, the separation section including: a transporting roll that transports recording sheets in a transporting direction; and a separation roll that is placed to be opposed to and to be press-contacted with the transporting roll through a recording sheet, the transporting-speed reduction suppressing section changing a separation torque of the separation roll according based on a result of detection by the multiple-feed detecting section and a result of detection by the slippage detecting section.

Abstract: A recording medium supply apparatus includes: a conveyance member that conveys a recording medium; a retard member, in contact with the conveyance member, that forms a contact portion between the conveyance member and the retard member and retards the recording medium by holding the recording medium in the contact portion; and a buckling prevention unit, configured to contact with the recording medium on the upstream side of the contact portion between the conveyance member and the retard member in a conveyance direction of the recording medium, that prevents buckling of the recording medium in the conveyance direction.

Abstract: An image formation apparatus includes: a toner image formation section that forms a toner image on a recording medium; a fixing device that fixes the toner image; a first roller provided downstream from the fixing device in a transport direction of the recording medium, the first roller coming in contact with a first side of the recording medium and transporting the recording medium; and a second roller abutting the first roller, the second roller coming in contact with a second side of the recording medium opposite to the first side and transporting the recording medium. The solubility parameter on a surface of the first roller is different from the solubility parameter on a surface of the second roller.