A feeding unit to feed blanks in a packer machine has a frame supporting a hopper and conveyor. The hopper holds a stack of blanks and has a pick-up opening, through which one blank at a time can be retrieved from the stack. The conveyor moves the blanks along a moving path ending in the hopper. The feeding unit can be adjusted by a format change operation to contain blanks with different formats by changing the feeding unit from a first configuration for containing a first format to a second configuration for containing a second format, different from the first format. A plurality of different and interchangeable hoppers are provided, each associated with a corresponding format of the blanks. Each hopper is fixed to the frame in a removable manner in order to be replaced during a format change operation.

A device for storing a sheet pile in a converting machine (10) comprises a transfer mechanism (28) for delivering sheets (22) into a piling area (26) of the device (22), and a sampling plate (44) which is adjustable between a sampling position and an access position, wherein the top of the piling area (26) is covered by the sampling plate (44) when the sampling plate (44) is in the sampling position and the top of the piling area (26) is free when the sampling plate (44) is in the access position.

Provided is a sheet feeding apparatus provided with a storage chamber for storing sheets, a sheet feeding unit including a delivery roller for contacting the sheet stored in the storage chamber to deliver the sheet from the storage chamber, a support member for supporting the storage chamber to allow the chamber to be installed and pulled out in/from an apparatus main body, and a press force switch mechanism including an operation member to switch a press force used for the delivery roller to contact the sheet, the sheet feeding unit is configured to be capable of being installed and pulled out in/from the main body apparatus integrally with the storage chamber, and the press force switch mechanism is provided in the sheet feeding unit.

A placement tray 50, which is displaceable to a closed state and an open state with respect to a device main body 34, has a placement surface 51 on which a medium is placed, edge guides 531, 532 that restrict side edges of the medium to be placed, and a link member 551 that supports the placement tray in the open state. The edge guide has a movable section 571 that pivotably switches between a non-use posture in which it reclines along the placement surface and a use posture in which it is upright against the placement surface, and an operation section 611 that is fixed in posture against the placement surface and is operated. At least a part of the operation section is provided at a position that overlaps the movable section and does not overlap the link member as viewed from the width direction that intersects the transport direction F of the medium.

A magazine for packs of blanks includes a vertical channel configured for inserting and extracting packs of blanks, a succession of groups of supporting parts movable between a retracted position to allow the packs of blanks to move along the channel towards a portion under the supporting part, and an at least partly extracted position, in which the supporting part intercepts a pack of blanks moving down the channel and provides a steady support for the pack of blanks, and transmission means configured to automatically move each supporting part from the retracted position to the at least partly extracted position when the supporting part immediately below it intercepts a respective pack of blanks, thereby defining the steady support.