Device for taking pieces of material stuck to a substrate wound on a reel

• US 4,048,494 A
• Filed: 12/12/1975
• Issued: 09/13/1977
• Est. Priority Date: 12/12/1975
• Status: Expired due to Term

• Current Assignee: Bernardus G. Liesting
• Original Assignee: Bernardus G. Liesting
• Inventors: Liesting, Bernardus G.
• Primary Examiner(s): LaRoche, Eugene R.
• Application Number:
  US05/640,208
• Time in Patent Office: 641 Days
• Field of Search: 250/223 R, 250/571, 250/224, 250/578, 198/20 R, 198/21, 156/DIG. 33, 156/DIG. 45
• US Class Current: 250/223.00R
• CPC Class Codes: B65C 9/1865 the labels adhering on a backing strip
• CPC Class Codes: B65C 9/42 Label feed control

Abstract

A device for removing adhesive labels or the like from a substrate in which a reel of the substrate material is rotatably mounted about an axis in a trough of a housing which also includes a horizontal guide supporting the substrate above the axis. The guide has a bending edge which separates label and substrate. The substrate is driven by rollers mounted below the axis and operated by a motor. A light source and photocell are disposed adjacent the bending edge for disabling the motor when a label is located therebetween.

Claims

1. A device for removing adhesive labels or the like from a substrate comprising:

a reel on which said substrate is wound;

means for mounting said reel for rotation about an axis of rotation;

a housing having a trough in which said reel is mounted with an open upper end, said housing including a horizontal guide having a horizontal surface for supporting said substrate situated at a level higher than said axis of rotation, and a bending edge for the substrate at the end of said guide surface remote from said trough;

a light source disposed adjacent said bending edge;

driving means located below said guide surface for engaging said substrate to pull said substrate past said edge so as to separate one at a time said labels from said substrate;

a photo-electric cell disposed adjacent said bending edge for producing a given electrical signal indicating the presence of a separated label, when said label is located between said source and said cell; and

circuit means connected to said photo-electric cell for disabling said driving means when said given signal is produced.

2. A device as claimed in claim 1, wherein the substrate is made from light-pervious material.

3. A device as claimed in claim 1 wherein driving means comprises two rollers which co-operate in such a way that the substrate is urged between the two rollers.

4. A device as claimed in claim 1 further including a battery which serves as a supply source.

5. A device as claimed in claim 1 further including a second light source and a second photo-electric cell, mounted such that a label from the substrate first passes the first light source and the first photo-electric cell and that the control means operates to stop the driving member when the label passes the first photo-electric cell and to start the driving member when the label is released from the substrate.

6. A device as in claim 1 wherein said control means includes a holding circuit, an actuating means for bringing the holding circuit in a first state, amplifier means connected to said cell for bringing the holding circuit in a second state, the holding circuit in its first state actuating said driving means and said source for illuminating the cell and in its second state deactivating said driving means.

7. A device according to claim 1 wherein said control means includes time delay means for bringing the holding circuit back to its un-activating state after a predetermined period following when said holding circuit was brought to its activating state.

8. Control circuit for a device according to anyone of the preceding claims comprising a holding circuit means, a first photo transistor amplifying and switching means for bringing the holding circuit in an activating state, a second photo transistor amplifying and switching means for bringing the holding circuit means in a not-activating state, the holding circuit activating a mechanical transporting means and illumination means in its activating state, and comprising further means cooperating with the first photo transistor amplifying and switching means and the second photo transistor amplifying and switching means for bringing back the holding circuit means to its not-activating state in response upon the mechanical transporting means having transported a medium to be transported over a certain distance.

9. A device according to claim 8 further comprising a time delay means to bring the holding circuit means back to its not-activating state after a certain period of time has lapsed since the holding circuit means was brought in its activating state.

10. A device as claimed in claim 1 wherein said driving means comprises a pair of rollers, a third roller and an endless belt passed around said pair of rollers and adapted to co-operate with said third roller to urge the substrate against the belt.

11. A device as claimed in claim 10 wherein said pair of rollers are mounted in the housing and said third roller co-operating with the belt is journalled in a lid pivoted to the housing.

12. A device as claimed in claim 11 wherein the bending edge is formed by the end of a plate arranged in the housing, while a lid pivoted to the housing is provided with a plate extending parallel to the plate inside the housing so that the belt is passed between said two plates.

13. A device as claimed in claim 12 wherein near the bending edge the plate inside the housing has an opening beneath which a light source is provided, while above said opening said photo-electric cell is arranged in the plate forming part of the lid.

14. A device as claimed in claim 1 wherein said circuit means comprises an amplifier controlled by said photo-electric cell and in that the adjustment of the amplifier is such that at a decrease in the quantity of light incident to said cell during the passage of said label the output signal of the amplifier is not varied.

15. A device as claimed in claim 14 wherein said circuit means includes a bistable circuit, which is set into a first state from the outside and can be set in the other state by the input signal of the amplifier.

16. A device as claimed in claim 15 wherein said amplifier, the photo-electric cell and the driving means are connected to one of the transistors of the bistable circuit.

17. A device as claimed in claim 15 wherein the bistable circuit is designed so that two transistors are conducting in one state and non-conducting in the other state.

18. A device as claimed in claim 15 wherein the amplifier is fed back for direct current and is at least partly discoupled for alternating current.