Method and apparatus for removing a plastic film from packages

Abstract

Present invention relates to the method and apparatus for removing a plastic film from packages, where packages covered by the plastic film are introduced to the first transport path characterized in that an sorbent (12) is introduced to the second transport path. Next the sorbent (12) is heated to the flow temperature of the plastic that is removed, in particular plastics from the polyolefin's group. Afterwards within the common part of the first and second transport path (2) of the separating device the sorbent (12) is mixed with transported packages (11) covered with a plastic film. A sieve (8) of the separating device directs sorbent (12) covered by absorbed plastic to the removing path (6,9), while packages (11) free from plastic film are directed towards the exit gate (4) of the separating device.

Description

BRIEF DESCRIPTION OF THE DRAWING

The subject matter of the invention has been described below in a preferable embodiment with relation to the drawing at which device according to the invention has been presented in an isometric view.

In the device presented at the drawing, packages comprising tobacco products (11) and covered with a plastic film are thrown or in other way introduced through an inlet (1). The process part (2) of the device comprises transport means (3) forcing a transport of the packages (11) and sorbent (12) inside the device. In the embodiment presented, the transport means (11) is a feeding screw.

Claims

1. Method for removing a plastic film, where package covered by the plastic film is introduced to the first transport path characterized in that an sorbent (12) is introduced to the second transport path, further the sorbent (12) is heated to the flow temperature of the plastic that is removed, in particular plastics from the polyolefin's group, or to the higher temperature, within the first common part of the first and second transport path (2) of the separating device the sorbent (12) is mixed with packages (11) covered with a plastic film, further a sieve (8) of the separating device directs sorbent (12) covered by absorbed plastic to the removing path (6,9), while packages (11) free from plastic film are directed towards the exit gate (4) of the separating device.

2. Method according to claim 1, characterized in that a sorbent has a form of granules of the substance that is wetting by polyolefines, in particular granules are porous, uniform particles of metal and/or particles of metal placed within ceramic substrate.

3. Method according to claim 1, characterized in that a sorbent has a form of uniform or layered granules, in particular metal balls of a diameter from 0.5 mm to 50 mm.

4. Method according to claim 1, characterized in that a sorbent has a form of rolls with a working surface covered with a layer of a porous metal.

5. Method according to claim 1 characterized in that as a sorbent for direct contact with a plastic that is removed, a polyolefin oxy catalyst is used.

6. Method according to claim 1 characterized in that the material of sorbent is chosen from a group of materials having better affinity with a plastic material of the film being removed than with a package material.

7. Separating apparatus for removing a plastic film comprising transport path for transporting objects covered with a plastic film and transport path for transporting a sorbent characterized in that in the transport path (5, 6, 7, 8) for transporting sorbent (12) heating means are provided for heating sorbent to the flow temperature of the plastic material that is removed or to the higher temperature, and both paths comprise common part for mixing sorbent (12) with objects (11) covered with a plastic film, the common part of the transport paths comprises separating means (8) for separating sorbent and objects free from a plastic film.