Rotary cutting unit for trimming sheet material
First Claim
1. A rotary cutting unit for trimming sheet material, comprising:
- a support plate for receiving the sheet material;
a rotary cutting device is joined to the support plate;
the rotary cutting device comprises a guide bar;
a knife carriage is guided on and displaceable along the guide bar;
a rotary knife is rotatably mounted on the knife carriage;
the guide bar is held at one end by a first guidance device and at a second end by a second guidance device;
the guide bar is guided in the guidance devices movably between an initial position raised with respect to the support plate and a clamping position lowered in a direction toward the support plate;
the guide bar comprises a lower side which acts as a clamping surface for contact against the sheet material;
a first spring device acts on the guide bar in a direction toward the initial position;
an actuation device for moving the guide bar out of the initial position into the clamping position;
the actuation device is movable between a starting position in which the guide bar is in the initial position, and a final position in which the guide bar is in the clamping position;
the actuation device comprises an immobilization device that releasably immobilizes the actuation device in the final position, wherein the guide bar is clamped in vertically movable fashion between the first spring device and a second spring device;
the second spring device has a spring action directed oppositely to the first spring device;
the actuation device acts on the guide bar by means of the second spring device.
1 Assignment
0 Petitions
Accused Products
Abstract
A rotary cutting unit for trimming sheet material has a support plate for receiving the sheet material. The rotary cutting device having a guide bar with a displaceably guided knife carriage. A rotary knife is rotatably mounted on the knife carriage. The guide bar is guided between an initial raised position and a lowered clamping position. The guide bar includes a clamping surface for contact against sheet material. The guide bar has a force impinged upon it by a spring device, in the direction toward the initial position. An actuation device moves the guide bar out of the initial position into the clamping position. The guide bar is clamped in vertically movable fashion between the spring device and a further spring device. The second spring device has a spring action directed oppositely to the first.
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Citations
18 Claims
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1. A rotary cutting unit for trimming sheet material, comprising:
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a support plate for receiving the sheet material; a rotary cutting device is joined to the support plate; the rotary cutting device comprises a guide bar; a knife carriage is guided on and displaceable along the guide bar; a rotary knife is rotatably mounted on the knife carriage; the guide bar is held at one end by a first guidance device and at a second end by a second guidance device; the guide bar is guided in the guidance devices movably between an initial position raised with respect to the support plate and a clamping position lowered in a direction toward the support plate; the guide bar comprises a lower side which acts as a clamping surface for contact against the sheet material; a first spring device acts on the guide bar in a direction toward the initial position; an actuation device for moving the guide bar out of the initial position into the clamping position; the actuation device is movable between a starting position in which the guide bar is in the initial position, and a final position in which the guide bar is in the clamping position; the actuation device comprises an immobilization device that releasably immobilizes the actuation device in the final position, wherein the guide bar is clamped in vertically movable fashion between the first spring device and a second spring device; the second spring device has a spring action directed oppositely to the first spring device; the actuation device acts on the guide bar by means of the second spring device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A rotary cutting unit for trimming sheet material comprising:
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a support plate for receiving sheet material; a rotary cutting device joined to the support plate, said the rotary cutting device comprises a guide bar; a knife carriage guided on and displaceable along said guide bar; a rotary knife rotatably mounted on said knife carriage; guidance devices holding the ends of said guide bar and said guide bar is guided in the guidance devices movably between an initial position raised with respect to said support plate and a clamping position lowered in a direction toward said support plate; said guide bar having a lower side; an elastomeric strip attached directly to and in surface to surface contact with the lower side of said guide bar; said guide bar having a force impinged upon it by a first spring device, in a direction toward the initial position and as far thereas; an actuation device for moving said guide bar out of the initial position into the clamping position, said actuation device being movable between a starting position in which said guide bar is in the initial position, and a final position in which said guide bar is in the clamping position; and the actuation device comprises an immobilization device that releasably immobilizes the actuation device in the final position, wherein the guide bar is clamped in vertically movable fashion between the first spring device and a second spring device; the second spring device has a spring action directed oppositely to the first spring device; and the actuation device acts on the guide bar by means of the second spring device. - View Dependent Claims (17, 18)
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Specification