Roller-type compression-incision-cutting unit

Patent metadata

Field	Value
Publication number	US-10913173-B2
Application number	US-201013321124-A
Country	US
Kind code	B2
Filing date	May 14, 2010
Priority date	May 25, 2009
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

A roller-type compression—incision—cutting unit for packaging material webs comprises: a motor-driven roller (2) provided with at least one projecting incision—cutting profile (3); a driven counter-roller (4) provided with at least one abutting counter-profile (5); kinematic means (6) for directly transmitting motion, in a synchronised fashion, between the roller (2) and the counter-roller (4), the kinematic means being connected to respective shafts (2a, 4a); adjustable pusher elements (7), adapted to allow an incision or cutting contact between the roller (2) and the counter-roller (4); at least one rolling element (10, 11) interposed between the roller (2) and the counter-roller (4), and adapted to separate the rotation of the motor-driven roller (2) from the rotation of the thrust rings of the driven counter-roller (4).

First claim

The invention claimed is:

1. A roller-type compression incision cutting unit for packaging material comprising:
a drive roller having a first shaft and defining a first axis and including a projecting compression incision cutting profile; the roller being adapted to rotate about the first axis and comprising first and second supporting elements on opposite ends of the first shaft respectively;
a driven counter-roller having a second shaft and defining a second axis parallel with the first axis, the second shaft having a first end portion adjacent a first end thereof and a second end portion adjacent a second, opposite, end thereof, the counter-roller including an outer surface with an abutting counter-profile configured to cooperate with the projecting compression incision cutting profile, wherein the counter-roller, including the outer surface, is driven in rotation on the second axis when the second shaft is rotated;
a first gear wheel fitted on the first shaft supporting the drive roller;
a second gear wheel fitted on the second shaft supporting the counter-roller, the first gear wheel meshing with the second gear wheel for directly transmitting motion, in a synchronized fashion, between the drive roller and the counter-roller;
first and second thrust assemblies respectively mounted on the first and second end portions of the second shaft and respectively in direct and continuous rolling contact with the first and second supporting elements,
the first thrust assembly comprising:
a single first bearing between the first supporting element and the first end portion of the second shaft; and
a first rolling thrust ring encircling the first bearing and, concentrically with the outer surface, being in direct and continuous rolling contact with the first supporting element, the first rolling thrust ring being made of metal;

the second thrust assembly comprising:
a single second bearing between the second supporting element and the second end portion of the second shaft; and
a second rolling thrust ring encircling the second bearing and, concentrically with the outer surface, being in direct and continuous rolling contact with the second supporting element, the second rolling thrust ring being made of metal;

wherein the first and second bearings have respective first and second internal parts, respective first and second external parts and respective first bearing balls and second bearing balls, the first and second external parts being in contact with the respective first and second rolling thrust rings, the first internal and external parts of the first bearing being in rolling contact with the first bearing balls and the second internal and external parts of the second bearing being in rolling contact with the second bearing balls;
wherein the first and second internal parts are rigidly fixed to the first and second end portions of the second shaft, respectively; and
wherein the first and second rolling thrust rings are effective to rotate about the second axis driven in rotation by the first and second supporting elements of the drive roller respectively by friction, in such a way as to keep a speed of rotation of the driven counter-roller independent of a speed of rotation of the first and second rolling thrust rings, to allow the rotation of the counter-roller to be driven only by the directly transmitted motion of the meshing first and second gear wheels.

2. The unit according to claim 1 , wherein, at the first and second thrust assemblies and the first and second supporting elements, the drive roller does not transmit a rotational torque to the counter-roller.

3. The unit according to claim 1 , wherein each of the first and second rolling thrust rings is made of a circular band of metal having a rectangular cross-section extending axially to form a uniform interior cylindrical surface encircling and engaging the respective external part to stiffen the respective first and second bearings.

4. The unit according to claim 1 , wherein the packaging material consists of filter paper webs suitable to contain infusion products.

5. The unit according to claim 1 , comprising first and second pusher elements configured to push the respective first and second thrust assemblies into contact with the respective first and second supporting elements, the first and second pusher elements being effective to push against the first and second end portions respectively of the second shaft and correspondingly urge the second shaft towards the first shaft.

6. The unit according to claim 5 , wherein the first and second pusher elements are mounted, respectively, adjacent to the first and second end portions of the second shaft.

7. The unit according to claim 5 , wherein the second shaft is positioned between the first shaft and the first and second pusher elements.

8. The unit according to claim 5 , wherein each of the first and second end portions of the second shaft has an inner end portion and an outer end portion adjacent to each other, each of the first and second pusher elements being arranged to push against the respective outer end portion, each of the first and second bearings being mounted on the respective inner end portion.

9. The unit according to claim 8 , wherein each of the first and second pusher elements comprises a screw connected in such a way to be able to push against a respective first and second shoe.

10. The unit according to claim 9 , comprising first and second counter-bearings rotationally mounted at the respective outer end portions of the second shaft of the counter-roller, wherein the first pusher element pushes the first shoe against the first counter-bearing, the first shoe contacting an exterior surface of the first counter-bearing, and wherein the second pusher element pushes the second shoe against the second counter-bearing, the second shoe contacting an exterior surface of the second counter-bearing.

11. The unit according to claim 10 , wherein each of the first and second shoes has a respective opening, each of the first and second pusher elements has a first end extending from a body, the first end of the first pusher element engaging the first shoe at the respective opening, the first end of the second pusher element engaging the second shoe at the respective opening.

12. The unit according to claim 11 , and further comprising a spacer positioned around the first end of each of the first and second pusher elements, the spacer having a spacer width greater than a width of the body of each of the first and second pusher elements whereby the pushing force is distributed along the respective shoe.

13. The unit according to claim 5 , wherein the first pusher element is located distal to the first thrust assembly, and the second pusher element is located distal to the second thrust assembly.

14. The unit according to claim 5 , wherein the first pusher element is axially offset from the first thrust assembly along the first end portion of the second shaft and the second pusher element is axially offset from the second thrust assembly along the second end portion of the second shaft.

Assignees

• Betti Claudio
• Ima Spa

Inventors

• Betti Claudio

Classifications

• B65B61/08

  using rotary cutters · CPC title

• B26F1/384 Primary

  using rotating drums · CPC title

• B65B29/025

  packaging infusion material into pods · CPC title

• B26D1/626

  for thin material, e.g. for sheets, strips or the like · CPC title

• B26D7/265

  Journals, bearings or supports for positioning rollers or cylinders relatively to each other · CPC title