Apparatus for positioning devices for operating upon sheets or webs
AssigneeJagenberg Aktiengesellschaft
InventorsErnst-Gunther Urban, Heiko-Christian Knoll
Life of this patent
Estimating the term…
Abstract
An apparatus for positioning devices, especially longitudinal rotary cutting blades for slitting a web of material has slides displaceable along respective guides and a belt which has oppositely moving stretches as the belt is moved in a single sense. A coupling, e.g. a double-acting piston, between the belt stretches and the slide can be actuated to press against one or the other stretch or pass of the belt to couple it with the slide. The coupling also has a cylinder-and-piston for clamping the slide against the guide to lock the slide in position when the proper position is reached.
Claims12
An apparatus for positioning rotary blades of a web-slitting device for slitting a flat workpiece in the form of a web, comprising:
- a substantially rectilinear guide for said device;
- a slide carrying said rotary blades of said device and shiftable along said guide;
- an endless belt having two oppositely moving longitudinal stretches parallel to said guide;
- and
- coupling means on said slide disposed between said longitudinal stretches and having respective elements selectively and alternatively engageable with said stretches to couple said slide to said stretches selectively for movement in the direction of a respective one of said stretches along said guide, said elements being respective piston ends, and said coupling means including a double-acting piston and cylinder unit and said piston ends are ends off a single piston of said unit displaceable in opposite directions in a cylinder of said unit to selectively engage one of said stretches.
An apparatus for positioning a device for operating upon a flat workpiece, comprising:
- a substantially rectilinear guide for said device;
- a slide carrying said device and shiftable along said guide;
- an endless belt having two oppositely moving longitudinal stretches parallel to said guide;
- and
- coupling means on said slide disposed between said longitudinal stretches and having respective elements selectively and alternatively engageable with said stretches to couple said slid to said stretches selectively for movement in the direction of a respective one of said stretches along said guide, said device comprising two cooperating parts, one of said parts being mounted on said slide, the other of said parts being mounted on a second slide guide and displaceable by a parallel to the first-mentioned guide and displaceable by a respective second endless belt and having a second coupling means received between stretches of said second belt and having respective elements selectively and alternatively engageable with said stretches of said second belt to couple said second slide to said stretches of said second belt selectively for movement in the direction of a respective one of said stretches of said second belt along said second guide, ne of said slides being provided with an absolute position-measuring unit for measuring displacement along the respective slide, said parts being rotary blades of a web-slitting device, said elements being respective piston ends, each of said coupling means including a double-acting piston and cylinder unit and said piston ends are ends of a single piston of said unit displaceable in opposite directions in a cylinder of said unit to selectively engage one of said stretches, said stretches being guided along respective surfaces of said slide so that said ends respectively and selectively clamp the respective stretches against the respective surface.
Dependencies are inferred from the claim text.