A chain tensioner (50; 500) for a conveying device (70) of a machine (1; 1) for processing elements in the form of sheets (10), the conveying device (70) includes two lateral chain sets connected to the ends of transverse gripper bars (75) able to grasp the elements (10) and at least one chain-guiding device (90) configured to guide a respective chain set (80); the chain tensioner (50; 500) includes: an actuator (9) controlled by a control unit (8), a movable support (11), a transmission element (12) borne by the movable support (11), a rotary element (13) rotated by the actuator (9) and cooperating with the transmission element (12) in order to exert a thrust force on the movable support (11), the rotary element (13) being rotatable, to adjust the tension of the chain set (80). The actuator (9) is controlled in synchronism with the machine angle (MA). A machine (1; 1) for processing elements and a method for tensioning the chain sets (80) of the conveying device (70) are disclosed.

A sheet feeding apparatus includes a stacking part, a feeding part, a separation part, an abutment part comprising an abutment area, the abutment part being configured to move between a first position and a second position, a transmission part comprising a rotary member and configured to transmit driving power from a driving source to the feeding part via the rotary member, the rotary member being configured to be stopped every one rotation, and a moving part configured to move the abutment part in response to rotation of the rotary member such that (1) the abutment part positions at the first position in a case where the rotary member is stopped, and (2) the abutment part moves from the first position to the second position and from the second position to the first position while the rotary member makes one rotation.

A sheet processing apparatus, including: a conveyance path in which a sheet is conveyed in a predetermined conveyance direction; a rotary member pair configured to nip the sheet conveyed in the conveyance path and rotate to perform folding processing on the sheet; and a guide portion provided between one rotary member of the rotary member pair and the conveyance path and configured to guide a downstream edge of a sheet conveyed in the predetermined conveyance direction, wherein, in case that a sheet is conveyed in the conveyance path in the predetermined conveyance direction, the guide portion guides a downstream edge of the sheet in the predetermined conveyance direction in a state in which the guide portion is held in contact with the one rotary member.

A cutting device includes a fixed blade and a movable blade that slides with respect to the fixed blade during cutting, the movable blade having a first end that engages with the fixed blade at cutting start and a second end that engages with the fixed blade at cutting end, an urging member connected to the movable blade to urge the movable blade towards the fixed blade and a rotation of the movable blade in a first rotational direction, and a support for the movable blade having a shaft that rotates as the movable blade moves, the shaft having a center portion and first and second ends rotatably connected to the movable blade, wherein points of connection of the first and second ends are at locations that urge a rotation of the movable blade in a second rotational direction opposite the first rotational direction.

A feeding apparatus includes a sheet supporting member, a feeding member, and a lift unit. The lift unit lifts and lowers the sheet supporting member to abut a sheet stacked on the sheet supporting member against the feeding member. The lift unit includes an urging member that biases the sheet supporting member towards the feeding member, a moving member that moves in a first direction different from a sheet supporting member lifting direction, and a contact member in contact with the moving member. The contact member includes a curved cam surface in a region that comes in contact with the moving member. A contact state between the moving member and the contact member is changed by moving the moving member in the first direction and the curved cam surface. Regarding changing the contact state, the sheet supporting member can be moved to a feed position and a retracted position.

An example system includes a pressure plate actuating portion. The pressure plate actuating portion includes a cam gear coupled to a cam arm and a pressure plate arranged to be driven by the cam arm as the cam arm rotates with the cam gear through a pick-up cycle, the pressure plate being biased in a first direction toward the cam arm with a pressure plate spring. The example system also includes a pressure plate release control portion, the pressure plate release control portion being arranged to transfer potential energy from the pressure plate spring in a gradual manner.

The invention relates to a folding machine for paper and soft folding material, comprising a supporting frame (1), in which a rotary bearing (2) is rotatably mounted, the rotary bearing containing mutually parallel rotatable working rolls (17, 18, 19), wherein: a pressing device (6) for pressing the paper (39) onto positions of the rotary bearing (2) is provided, and an outer control element (7) which is rotated conjointly with the rotary bearing is provided: the pressing device (6) is mounted in an opening flap (26) and is formed by two profiled elements (28, 36), which are controlled by the outer control element (7); the first profiled element (28) receives and transports the paper (39) in cooperation with a first working roll (17), and the second profiled element (36) leads the paper (39), in contact with a first working roll (17) and a third working roll (19) running oppositely to each other, to a folding gap (44); and a pivoting nose (20), which is rotated conjointly with the rotary bearing (2) and is positively controlled by means of an inner control element (11), is provided for a second folding of the paper (39) in a second folding gap (45) between the first working roll (17) and the second working roll (18).

A sheet feeding apparatus, comprising: a feeding rotating member; a cam member; a driving force transfer portion configured to transfer a driving force from a drive source to the cam member and include a one-way clutch the one-way clutch transferring a driving force causing the cam member to rotate in a first direction; a link member configured to press the support member to rotate based on the rotation of the cam member; and a brake unit configured to reduce a rotational torque which is generated by the cam member pressing the link member to cause the cam member to rotate in a first direction in a case where the cam member rotates in the first direction by a driving force transferred from the drive source through the driving force transfer portion to make the feeding rotating member move from the separation position to the feed position.

A recording apparatus includes a return member switchable between a first orientation in which a portion of the return member overlaps a feed roller in a side view of a medium feeding path and a second orientation in which the return member is turned toward a downstream side in a medium feeding direction and does not overlap the feed roller. The return member changes an orientation thereof from the second orientation to the first orientation, thereby returning a medium to an upstream side in the medium feeding direction. When a transport roller disposed downstream of the feed roller is driven in reverse to return the medium to the upstream side and position the medium at a recording start position, the return member takes a third orientation in which the return member is raised toward the upstream side further than in the first orientation.

A feed assembly for transferring an uncoiled sheet material to a downstream material forming operation. The assembly includes upper and lower feed rolls between which the sheet material passes, the upper roll being actuated between engaging or disengaging positions relative to an upper surface of the sheet material. At least one continuous force applying component is provided for exerting a hold down force against the upper feed roll and, in combination, a programmable counterbalance component is calibrated to counter the hold down force exerted by the force applying component and in order to cycle the upper roller between the engaged and disengaged positions during advance cycling of the uncoiled material to the downstream forming operation.