Sheet feeder for a machine for processing material in sheet form, such as paper, cardboard or films
AssigneeBobst Grenchen AG
InventorStefan Wick
Life of this patent
Estimating the term…
Abstract
Sheet feeder (4) for a machine (1) for the processing of sheet material such as paper or films, having a drive shaft (10), which extends substantially perpendicular to a sheet feeding direction and is provided with at least one suction gripper (12), which is rotated above the sheet material, when the drive shaft (10) is driven, wherein the suction gripper (12) is repositionable between an inactive position, in which it does not cooperate with the sheet material, and an active position, in which it can grip on the top side of the sheet material and carry this along.
Claims19
A sheet feeder for a machine for processing of sheet material, comprising:
- a drive shaft, which extends substantially perpendicular to a sheet feeding direction and is provided with at least one suction gripper, which is rotated above the sheet material, when the drive shaft is driven,
- wherein the suction gripper is repositionable between an inactive position, in which a ram of the suction gripper is provided in a retracted position so that the suction gripper does not cooperate with the sheet material, and an active position, in which the ram of the suction gripper is provided in an extended position so that the suction gripper can grip on a top side of the sheet material and carry the sheet material along, and
- wherein at least one pneumatic channel, with which the suction gripper is connected, is integrated into the drive shaft to extend the ram from the retracted position to the extended position.
A sheet feeder for a machine for processing of sheet material, comprising:
- a drive shaft, which extends substantially perpendicular to a sheet feeding direction and is provided with at least one suction gripper, which is rotated above the sheet material, when the drive shaft is driven,
- wherein the suction gripper is repositionable between an inactive position, in which a ram of the suction gripper is provided in a retracted position so that the suction gripper does not cooperate with the sheet material, and an active position, in which the ram of the suction gripper is provided in an extended position so that the suction gripper can grip on a top side of the sheet material and carry the sheet material along,
- wherein each suction gripper has a body, the ram, and a suction cup attached to the ram to be repositionable relative to the body, the body being attached at a distance from a central axis of the drive shaft, and
- wherein a radius, on which the body is moved around the drive shaft, is variable.
A sheet feeder for a machine for processing of sheet material, comprising:
- a drive shaft, which extends substantially perpendicular to a sheet feeding direction;
- a holding arm provided on the drive shaft, and including a guide slot extending in a radial direction of the drive shaft;
- a guide track;
- a holding rod provided in the guide track and in the guide slot, repositionable in the guide slot in the radial direction of the drive shaft, and extending substantially parallel to the drive shaft;
- and
- a suction gripper provided on the holding rod, which is rotated above the sheet material when the drive shaft is driven,
- wherein the suction gripper is repositionable between an inactive position, in which the suction gripper does not cooperate with the sheet material, and an active position, in which the suction gripper can grip on a top side of the sheet material and carry the sheet material along.
Dependencies are inferred from the claim text.