Rotary blade device for printed products
View Patent ↗A rotary blade device for interacting with printed materials has a rotating arm, a first pulley rotatably supported on the rotating arm, a first blade fixed to the first pulley, a fixed pulley, and a first belt connecting the first pulley to the fixed pulley so that as the arm rotates, the first pulley rotates with respect to the arm.
1. A rotary blade device for interacting with printed materials comprising:
a rotating arm,
a first pulley rotatably supported on the rotating arm,
a first blade fixed to the first pulley and arranged vertically to support a sheet of printed material,
a fixed pulley, and
a first belt connecting the first pulley to the fixed pulley so that as the arm rotates, the first pulley rotates with respect to the arm, wherein the first blade remains vertically oriented during rotation of the arm and the first pulley.
2. The rotary blade device as recited in claim 1 further comprising a second blade and a second pulley rotatably supported on the rotating arm.
3. The rotary blade device as recited in claim 2 further comprising a second belt and wherein the second pulley is connected to the fixed pulley via the second belt.
4. The rotary blade device as recited in claim 3 wherein the fixed pulley includes a first section and a second section coaxial with the first section, the first section contacting the first belt and the second section contacting the second belt.
5. The rotary blade device as recited in claim 3 wherein the first belt and the second belt each have a toothed side interacting the first pulley and second pulley, respectively.
6. The rotary blade device as recited in claim 2 wherein the second blade is spaced 180 degrees from the first blade.
7. The rotary blade device as recited in claim 1 wherein the first belt has a toothed side interacting with the first pulley and fixed pulley, the first pulley and the fixed pulley also being toothed.
8. The rotary blade device as recited in claim 1 further comprising a tension adjustment roller supported on the rotating arm between the first pulley and fixed pulley and contacting the first belt.
9. The rotary blade device as recited in claim 8 wherein the rotating arm has a slot, the tension adjustment roller being slidable in the slot.
10. The rotary blade device as recited in claim 1 wherein the first blade has a paper contacting edge and a cutout on the paper contacting edge.
11. The rotary blade device as recited in claim 1 wherein the first blade is located on a first side of the rotating blade and the first pulley, fixed pulley and first belt are located on another side of the rotating blade.
12. A rotary blade device for interacting with printed materials comprising:
a drive shaft;
a rotating arm driven by the drive shaft,
a first pulley rotatably supported on the rotating arm,
a first blade fixed to the first pulley and arranged vertically to support a sheet of printed material,
a fixed pulley located coaxially with the drive shaft, and
a first belt connecting the first pulley to the fixed pulley so that as the arm rotates, the first pulley rotates with respect to the arm, wherein the first blade remains vertically oriented during rotation of the arm and the first pulley.
13. The rotary blade device as recited in claim 12 wherein the drive shaft passes through the fixed pulley.
14. The rotary blade device as recited in claim 12 wherein the first blade has a paper contacting edge and a cutout on the paper contacting edge.
15. The rotary blade device as recited in claim 12 further comprising a second blade and a second pulley rotatably supported on the rotating arm.
16. The rotary blade device as recited in claim 15 further comprising a second belt and wherein the second pulley is connected to the fixed pulley via the second belt.
17. The rotary blade device as recited in claim 16 wherein the fixed pulley includes a first section and a second section coaxial with the first section, the first section contacting the first belt and the second section contacting the second belt.
18. The rotary blade device as recited in claim 16 wherein the first belt and the second belt each have a toothed side interacting the first pulley and second pulley, respectively.
19. The rotary blade device as recited in claim 15 wherein the second blade is spaced 180 degrees from the first blade.