Electromechanically operable apparatus for severing strip
AssigneeHengstler GmbH
InventorHorst Pfeiffer
Life of this patent
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Abstract
This invention relates to an electromechanically operable apparatus for severing strip, such as a paper tape or plastic film tape, which is dispensed by a power-operated dispenser. A swingable cutter blade is connected to a crank, which is operated by a gear train via an eccentric drive and a connecting rod, which is provided with a cam track cooperating with the crank. In dependence on the condition of the cam track and the sense of rotation of a motor for driving the gear train the extent of the angular movement imparted to the swingable cutter blade can be selected for the making of a complete cut or a partial cut through the strip.
Claims16
In an apparatus for severing strip, comprising
- a swingable cutter having a helical first knife edge;
- a stationary cutter having a second knife edge for cooperating with said first knife edge to cut through a strip extending between said cutters;
- and
- electromechanical drive means for operating said swingable cutter;
- the improvement residing in that said drive means comprise:
- an electric motor;
- an eccentric drive;
- a gear train operatively connecting said eccentric drive to said motor;
- a connecting rod having a longitudinal axis and connected to said eccentric drive and comprising a cam track extending generally in the direction of said axis;
- a crank, which is connected to said swingable cutter and cooperates with said cam track for imparting to said swingable cutter an angular cutting movement, in which said first knife edge cooperates with said second knife edge, and for providing between said crank and said cam track a lost motion generally in the direction of said axis;
- and
- an adjusting screw, which is mounted in said cam track for adjustment along the longitudinal axis of said connecting rod to adjust the extent of said lost motion and thus to control the extent of said angular cutting movement.
In an apparatus for severing strip, comprising
- a swingable cutter having a helical first knife edge;
- a stationary cutter having a second knife edge for cooperating with said first knife edge to cut through a strip extending between said cutters;
- and
- electromechanical drive means for operating said swingable cutter;
- the improvement residing in that said drive means comprise:
- an electric motor;
- an eccentric drive;
- a gear train operatively connecting said eccentric drive to said motor;
- a connecting rod having a longitudinal axis and connected to said eccentric drive;
- a crank, which is connected to said swingable cutter;
- a cam track, by which said connecting rod is operatively connected to said swingable cutter for imparting to said swingable cutter an angular cutting movement in which said first knife edge cooperates with said second knife edge;
- and
- an adjusting screw, which is mounted in said cam track for adjustment along the longitudinal axis of said connecting rod and controls the extent of said angular cutting movement.
Dependencies are inferred from the claim text.