Device and method for splicing

Patent metadata

Field	Value
Publication number	US-10322548-B2
Application number	US-201515310305-A
Country	US
Kind code	B2
Filing date	May 7, 2015
Priority date	May 12, 2014
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

The present disclosure relates to a method for splicing a web of packaging material, comprising: guiding the web of packaging material through a splicing device comprising one or more imaging devices, a slitter, and a sealing unit; acquiring a first set of images of one or more areas of the packaging material, storing the acquired first set of images, slitting the web of packaging material in one or more locations to form a tail end and a head end of a web of packaging material, aligning the head end and the tail end and superimpose one on the other in preparation for forming a splice, utilizing the imaging devices and the stored acquired first set of images to fine tune the alignment of the head end and the tail end, sealing the splice.

First claim

The invention claimed is:

1. A method for splicing a web of packaging material, comprising:
guiding the web of packaging material through a splicing device comprising one or more imaging devices, a slitter, and a sealing unit;
acquiring a first set of images of one or more areas of the packaging material,
storing the acquired first set of images,
slitting the web of packaging material in one or more locations to form a tail end and a head end in the web of packaging material after the acquiring of the first set of images,
aligning the head end and the tail end and superimposing one on the other in preparation for forming a splice,
utilizing the one or more imaging devices to acquire additional images of the one or more areas of the packaging material after the superimposing of the head end and the tail end of the web of packaging material and the stored acquired first set of images to fine tune the alignment of the head end and the tail end, wherein all of the one or more imaging devices are used for the acquiring of the first set of images and the additional images, sealing the splice.

2. The method of claim 1 , wherein the sealing is performed using a combination of heat and pressure during a predefined period of time.

3. The method of claim 1 , wherein the one or more imaging devices consists of a single imaging device.

4. The method of claim 1 , wherein the first set of images is acquired from an unaltered portion of the web of packaging material before any splicing of the web of packaging material.

5. The method of claim 1 , wherein the first set of images is stored in a memory for use on a subsequent web of packaging material.

6. The method of claim 1 , wherein the additional images of the one or more areas of the packaging material are compared to the stored acquired first set of images to fine tune the alignment of the head end and the tail end, the fine tuning being complete when the additional images and the stored acquired first set of images are identical.

7. The method of claim 1 , wherein
the one or more imaging devices are each fixed in the splicing device so that the web of packaging material is guided relative to the fixed one or more imaging devices, and
the method further comprises moving the head end and the tail end of the web of packaging material after the slitting of the web of packaging material by a fixed distance so that the additional images are taken at a same location of the web of packaging material as the first set of images.

8. The method of claim 1 , wherein
the one or more imaging devices consist of four imaging devices, and
two of the four imaging devices are positioned upstream of the one or more locations where the slitting occurs,
the other two of the four imaging devices are positioned downstream of the one or more locations where the slitting occurs, and
all of the four imaging devices collectively are used to acquire both the first set of images and the additional images.

Assignees

• Tetra Laval Holdings & Finance

Inventors

• Pettersson Thomas
• Öhman Peter

Classifications

• B29C66/43

  Joining a relatively small portion of the surface of said articles (B29C66/45 takes precedence) · CPC title

• B29C66/961

  involving a feedback loop mechanism, e.g. comparison with a desired value · CPC title

• B65H2301/33222

  90° · CPC title

• B65H19/1852

  taking place at a distance from the replacement roll · CPC title

• B29C66/8242

  Pneumatic or hydraulic drives (using fluid pressure directly acting on the parts to be joined B29C66/8266) · CPC title