Thermal compensating mount for a knife roll in a web processing machine
AssigneeElsner Engineering Works, Inc.
InventorJOHN MADDEN MATHY, JR.
Life of this patent
Estimating the term…
Abstract
A rotary cutting device comprising an anvil and roll having at least one knife affixed thereon, the roll being rotatably mounted to the machine by bearings disposed on opposing ends of the roll and supported by bearing mounts connected to the machine frame. A thermal isolating mounting arrangement orients the bearing mounts so that thermal growth occurs along an axis generally perpendicular to a plane in which the knife and anvil interface. A thermal isolator may also be disposed between the bearing mounts and the machine frame to further inhibit heat transfer into the frame and the resultant effect on knife position.
Claims13
A thermal compensating mount for a cutting apparatus in a web processing machine comprising:
- a base frame supporting a feed path along which a web of material travels;
- an anvil supported by the base frame;
- and
- a roll cutter with a knife, the roll cutter being generally parallel to and spaced apart from the anvil to permit passage of the web therebetween, the knife interacting with the web and the anvil to perforate the web, the roll cutter being supported along a roll axis by a bearing support block connected to the base frame, the connection of the bearing support block to the base frame arranged to limit thermal expansion in the bearing support block to occur predominately along an axis generally parallel to the feed path thereby minimizing changes in the spacing between the anvil and the roll cutter knife.
A thermal compensating cutting apparatus mount for a web processing machine comprising:
- a base frame supporting a feed path along which a web travels;
- an anvil supported by the base frame transverse to the feed path;
- a cutting roll rotatably supported by a bearing support block, the cutting roll having a peripherally attached knife for perforating the web by interaction between the knife and the anvil as the web passes therebetween;
- and
- a thermal isolating connection between the bearing support block and the base frame having an interface aligned generally perpendicularly to the feed path to limit movement of the cutter roll due to thermal expansion of the bearing support block to an axis parallel to the feed path.
In a web processing machine having a base frame supporting a conveyor defining a feed path along which a web of material is moved and a web cutting means transversely spanning the web, the web cutting means configured to perforate the web as it is moved along the feed path, the improvement in the web cutting means comprising:
- an anvil supported by the frame transversely spanning the web adjacent to a first side of the web moving along the feed path;
- a rotating cutter roll supported by first and second bearings to transversely span the web adjacent to a second side of the web opposite of the first side, the first and second bearings being held in position by first and second bearing blocks, respectively;
- a knife affixed to the cutter roll for rotation therewith positioned to interact with the web with each rotation and separated from the anvil by a gap;
- and
- a thermal isolating connection between the bearing support blocks and the frame to limit movement of the roll cutter knife due to thermal expansion of the bearing blocks to an axis generally parallel to the feed path.
Dependencies are inferred from the claim text.