Abstract:
A transport device includes a rotating member that rotates; a circulating member that is loop-shaped and wrapped around the rotating member, the circulating member being circulated by rotation of the rotating member; a pair of pinching members attached to the circulating member and circulated together with the circulating member, the pair of pinching members changing from a separated state, in which the pair of pinching members are separated from each other, to a closely positioned state to pinch a transport object that has entered a space between the pair of pinching members in the separated state; and a guide unit positioned to overlap the pair of pinching members in the separated state when viewed in one direction along a rotational axis direction of the rotating member, the guide unit guiding the transport object into the space between the pair of pinching members in the separated state.
Abstract:
This invention provides a stacker for use in forming stacks of cut sheets received from an upstream utilization device (e.g. a printer, cutter, etc.) that allows for positive driving of sheets into a stack using a stacking unit that includes a series of grippers that are adapted to grip and release a leading edge of each sheet at the appropriate time. In this manner, each sheet is gripped as it arrives from the upstream operation and is passed downstream into the stack, being released so as to properly decelerate at the stack's backstop. The grippers are mounted on a continuous belt between a pair of opposing drive sprockets. An edge sensor located upstream of the stacking unit triggers motion of the belts. The grippers are actuated by a mechanical cam arrangement to selectively grip and release at predetermined positions as the belt is driven.
Abstract:
This invention provides a stacker for use in forming stacks of cut sheets received from an upstream utilization device (e.g. a printer, cutter, etc.) that allows for positive driving of sheets into a stack using a stacking unit that includes a series of grippers that are adapted to grip and release a leading edge of each sheet at the appropriate time. In this manner, each sheet is gripped as it arrives from the upstream operation and is passed downstream into the stack, being released so as to properly decelerate at the stack's backstop. The grippers are mounted on a continuous belt between a pair of opposing drive sprockets. An edge sensor located upstream of the stacking unit triggers motion of the belts. The grippers are actuated by a mechanical cam arrangement to selectively grip and release at predetermined positions as the belt is driven.
Abstract:
A device for conveying a sheet through a printing machine includes a cylinder, formed with a channel wherein grippers are disposed for holding the sheet at a leading edge, a chain conveyor with grippers fixed to endless chains for holding and picking up the sheet at its leading edge from the cylinder and for holding the sheet at its trailing edge, and rotating sprockets carrying the chains. An actuating device is provided for opening and closing the grippers, and a drive is provided for the cylinder and the sprockets. Gripper pads and gripper tips for the trailing-edge grippers, in opened condition of the grippers, are able to run past the cylinder. The gripper pads and tips lie underneath a path described by the sheet. The trailing-edge grippers are closable in a rotational angle region wherein the chains run off the sprockets for the cylinder.
Abstract:
A hollow gripper bar having a hexagonal profile which reduces the bending and torsional stresses applied thereto by the acceleration and deceleration of the bar in a die cutting machine. The gripper bar includes an upper wall, a spaced lower wall, a leading wall and a trailing wall extending between the upper and lower walls. The leading wall includes a front top portion extending transversely from the upper wall and a front bottom portion disposed at an acute angle with respect to the front top wall portion. The trailing wall is similar in design to the leading wall and includes a rear top portion extending transversely from the upper wall and a rear bottom portion disposed at an acute angle with respect to the rear top portion. Both the front top portion and rear top portion have a thickness that is greater than the thickness of the upper wall. In addition, the front bottom portion as well as the rear bottom portion have a tapered thickness that gradually decreases from the front top portion and rear top portion, respectively, to the lower wall.
Abstract:
A clamping claw assembly is secured to an endless transport device, such as a chain conveyor. A fixed clamping jaw is engaged by a movable clamping jaw to secure a product placed between the two. The movable clamping jaw is carried by a lever arm which is movable by an actuating lever. The actuating lever is biased by a tension spring between stable open and closed positions, through a dead center position. The movable clamping jaw is in a locked condition when it is in its closed position due to the force applied by the tension spring.
Abstract:
In a slip sheet insertion-delivery apparatus, a plurality of printing sheet grippers opposite to some of a plurality of gripper pads mounted on a gripper pad shaft and slip sheet grippers opposite to the remaining gripper pads are mounted on one gripper shaft. The slip sheet grippers are loosely fitted on the gripper shaft through corresponding torsion springs. A cam mechanism is arranged to simultaneously open/close the printing and slip sheet grippers near a cylinder. Another cam mechanism including a plurality of cams is arranged to simultaneously open/close only the slip sheet grippers at a slip sheet insertion position.
Abstract:
To prevent the formation of ghosts as sheets are pulled off a delivery drum (1) by a transport chain arrangement, the gripper mechanism (3-6) on the chain transport is movably located thereon to impart forward movement to the gripped sheet in addition to the movement of the chain and so that tension on the sheet is continuously maintained. The mechanism for imparting said additional movement includes a holding bracket (12) secured to the chain (2) on which a carrier plate (13) is secured, the carrier plate being movable with respect to the holding bracket and retaining the gripper mechanism. The carrier plate can be moved by an angled cam follower lever (15) secured to the holding bracket and pushing the carrier plate, and hence the gripper mechanism, forwardly in the direction of movement of the chain when the cam follower lever is engaged by a suitably positioned cam.