One-way clutch arrangement for stretch wrapping machine

Patent metadata

Field	Value
Publication number	US-10822126-B2
Application number	US-201716096923-A
Country	US
Kind code	B2
Filing date	Apr 27, 2017
Priority date	Apr 28, 2016
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

A one-way clutch arrangement may be provided on a packaging material dispenser of a stretch wrapping machine in part to provide differing rates of rotation for upstream and downstream pre-stretch rollers in forward and reverse directions of the packaging material dispenser.

First claim

What is claimed is:

1. A method of winding packaging material onto a packaging material dispenser roll by a pre-stretch device in a stretch wrapping machine, comprising:
providing relative rotation between a load and the packaging material dispenser roll about an axis of rotation to dispense packaging material to the load;
driving an upstream pre-stretch roller and a downstream pre-stretch roller by a drive motor;
slipping both an upstream pre-stretch pulley and an upstream rewind pulley of the upstream pre-stretch roller relative to the rotation of the upstream pre-stretch roller in an unwind direction of packaging material travel to dispense the packaging material to the load;
locking both the upstream pre-stretch pulley and the upstream rewind pulley of the upstream pre-stretch roller relative to the rotation of the upstream pre-stretch roller in a rewind direction of packaging material travel to wind the packaging material around the packaging material dispenser roll.

2. The method of claim 1 , further comprising:
contacting the packaging material dispenser roll with the upstream pre-stretch roller to rotate the packaging material dispenser roll;
connecting a downstream pre-stretch pulley and a downstream rewind pulley to the downstream pre-stretch roller;
operatively connecting the downstream pre-stretch pulley with the upstream pre-stretch pulley; and
operatively connecting the downstream rewind pulley with the upstream rewind pulley;
wherein the upstream pre-stretch roller rotates with a surface speed that is slower than the downstream pre-stretch roller in the unwind direction of packaging material travel and wherein the upstream pre-stretch roller rotates with a surface speed that is at least as fast as the downstream pre-stretch roller in the rewind direction of packaging material travel.

3. The method of claim 2 , further comprising:
feeding the packaging material from the upstream pre-stretch roller to an idle roller and providing the packaging material from the idle roller to the downstream pre-stretch roller.

4. The method of claim 2 , further comprising connecting the drive motor, the rewind pulley of the downstream pre-stretch roller and the rewind pulley of the upstream pre-stretch roller by a drive belt.

5. The method of claim 4 , further comprising connecting the pre-stretch pulley of the downstream pre-stretch roller to the pre-stretch pulley of the upstream pre-stretch roller by a second belt.

6. The method of claim 5 , further comprising locking the pre-stretch pulley of the downstream pre-stretch roller and the rewind pulley of the downstream pre-stretch roller relative to rotation of the downstream pre-stretch roller in both the rewind direction of packaging material travel and the unwind direction of packaging material travel.

7. The method of claim 6 , wherein the pre-stretch pulley of the upstream pre-stretch roller rotates slower than the pre-stretch pulley of the downstream pre-stretch roller.

8. The method of claim 6 , wherein the rewind pulley of the upstream pre-stretch roller rotates substantially equal to the rotation of the rewind pulley of the downstream pre-stretch roller.

9. The method of claim 2 , further comprising providing at least one one-way clutch between the upstream pre-stretch roller and the upstream pre-stretch roller rewind and upstream pre-stretch roller pre-stretch pulleys.

10. A method of winding packaging material onto a packaging material dispenser roll by a pre-stretch device in a stretch wrapping machine, comprising:
providing relative rotation between a load and the packaging material dispenser roll about an axis of rotation to dispense a packaging material to the load;
passing the packaging material around an upstream pre-stretch roller and a downstream pre-stretch roller of the pre-stretch device;
rotating the upstream pre-stretch roller at a predetermined surface speed slower than that of the downstream pre-stretch roller during unwinding of the packaging material from the packaging material dispenser roll;
reversing the rotation direction of the upstream pre-stretch roller and downstream pre-stretch roller; and
rotating the upstream pre-stretch roller at a predetermined surface speed substantially equal to that of the downstream pre-stretch roller during winding of the packaging material onto the packaging material dispenser roll when the rotation direction of the upstream pre-stretch roller and downstream pre-stretch roller is reversed.

11. A method of winding packaging material onto a packaging material dispenser roll by a pre-stretch device in a stretch wrapping machine, comprising:
providing relative rotation between a load and the packaging material dispenser roll about an axis of rotation to dispense a packaging material to the load;
pre-stretching the packaging material in a pre-stretch device, the pre-stretch device having an upstream pre-stretch roller and a downstream pre-stretch roller;
operatively connecting the upstream pre-stretch roller with the downstream pre-stretch roller in a packaging material unwind direction to rotate the downstream pre-stretch roller with at a higher surface speed than that of the upstream pre-stretch roller to pre-stretch the packaging material; and
operatively connecting the upstream pre-stretch roller with the downstream pre-stretch roller in a packaging material rewind direction to rotate the upstream pre-stretch roller at a surface speed substantially equal to that of the downstream pre-stretch roller to rewind the packaging material on the packaging material dispenser roll.

12. The method of claim 11 , further comprising driving by a drive motor the downstream pre-stretch roller and the upstream pre-stretch roller.

13. The method of claim 12 , further comprising:
providing the downstream pre-stretch roller with a first and a second pulley, the first pulley having a diameter smaller than that of the second pulley;
providing the upstream pre-stretch roller with a first and a second pulley, the first pulley having a diameter smaller than that of the second pulley;
connecting the first pulley of the downstream pre-stretch roller with the second pulley of the upstream pre-stretch roller; and
connecting the second pulley of the downstream pre-stretch roller with the first pulley of the upstream pre-stretch roller.

14. The method of claim 13 , wherein the connecting is by a belt.

15. The method of claim 13 , further comprising freely rotating the first and second pulley of the upstream pre-stretch roller when the upstream pre-stretch roller is rotating in the unwind direction.

16. The method of claim 15 , further comprising locking the first and second pulley of the downstream pre-stretch roller to the downstream pre-stretch roller.

17. The method of claim 13 , further comprising interposing an idle roller between the upstream pre-stretch roller and the downstream pre-stretch roller to receive the packaging material from the upstream pre-stretch roller.

18. The method of claim 13 , further comprising operatively connecting the drive motor to the second pulley of the downstream pre-stretch roller and the first pulley of the upstream pre-stretch roller.

19. The method of claim 13 , further comprising:
locking the first and second pulley of the downstream pre-stretch roller to the rotation of the downstream pre-stretch roller in both the rewind and the unwind direction;
locking the first and second pulley of the upstream pre-stretch roller to the rotation of the upstream pre-stretch roller in the rewind direction an

Assignees

• Lantech Com Llc

Inventors

• Johnson Richard L
• Martin Curtis W

Classifications

• B65B57/04

  and operating to control, or to stop, the feed of such material, containers, or packages · CPC title

• B65B65/006

  Multiple parallel packaging lines · CPC title

• B65B11/04

  the articles being rotated · CPC title

• B65B11/025 Primary

  by webs revolving around stationary articles · CPC title

• B65B41/16

  by rollers · CPC title