Device and method for producing packaging precursors by means of a heating device acting on the edge area of the packaging precursor

Patent metadata

Field	Value
Publication number	US-11065824-B2
Application number	US-201716329737-A
Country	US
Kind code	B2
Filing date	Aug 24, 2017
Priority date	Aug 31, 2016
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

The invention relates in general terms to a device for production of a packaging precursor, wherein the packaging precursor consists to an extent of at least 80% by weight, based on the packaging precursor ( 1000 ), of a sheetlike composite, wherein the sheetlike composite includes:
i. a composite plastic layer, ii. a composite carrier layer, iii. a first composite edge region, iv. a second composite edge region, wherein the device includes, as device constituents in a flow direction: a) a flat transport unit designed to transport the flat sheetlike composite, wherein the transport unit includes a transport surface designed to bear the composite; downstream of that b) a first heating unit designed to heat the first composite edge region, where the first heating unit includes energy release segments; downstream of that c) a contacting unit designed to bond the first composite edge region to the second composite edge region;

wherein the first heating unit is designed to release energy in the flow direction. The invention further relates to a method, to a packaging precursor obtainable by the method, to a packaging precursor and to a use of the device.

First claim

The invention claimed is:

1. A device for production of a packaging precursor, wherein the packaging precursor consists to an extent of at least 80% by weight, based on the packaging precursor, of a sheetlike composite, wherein the composite includes:
i. a composite plastic layer,
ii. a composite carrier layer,
iii. a first composite edge region,
iv. a second composite edge region,
wherein the device includes, as device constituents in a flow direction:
a) a transport unit designed to transport the sheetlike composite, wherein the transport unit includes a transport surface designed to bear the composite; downstream of that:
b) a first heating unit designed to heat the first composite edge region, where the first heating unit includes at least 5 energy release segments; downstream of that:
c) a contacting unit designed to bond the first composite edge region to the second composite edge region;
wherein, along the flow direction, the first heating unit is designed to release energy,
wherein the first heating unit includes, in the flow direction, a first energy release segment and, in the flow direction, a last energy release segment furthest removed from the first energy release segment,
wherein the first energy release segment is designed to release a higher heating power than the last energy release segment, and
wherein the at least 5 of the energy release segments each have, in the flow direction, a length which is longer than an extent of the respective energy release segment transverse to the flow direction.

2. The device as claimed in claim 1 , wherein the first heating unit comprises an entry orifice through which gas can flow, wherein at least one of the following criteria is fulfilled:
a) the entry orifice is provided opposite the energy release segments;
b) the entry orifice is provided with a smaller distance from the first energy release segment than from the last energy release segment;
c) the entry orifice has a greater internal cross-sectional area than the sum total of the internal cross-sectional areas of all energy release segments.

3. The device as claimed in claim 1 , wherein a distance between an exit orifice of the first heating unit and the transport surface is at most as high as a length of the exit orifices of the first heating unit in the flow direction.

4. The device as claimed in claim 1 , wherein the device includes the sheetlike composite.

5. A method of producing a package precursor, comprising, as method steps,
a) providing the device as claimed in claim 1 and the sheetlike composite;
b) accelerating the sheetlike composite by the transport unit;
d) heating the first composite edge region by the first heating unit;
e) bonding the first composite edge region to the second composite edge region by the contacting unit,
wherein, in method step d), a first temperature in a region between the transport surface and the first energy release segment is T 1 , and a second temperature in a further region between the transport surface and the last energy release segment is Tn.

6. The method as claimed in claim 5 , wherein method step d) includes heating by thermal convection.

7. The method as claimed in claim 5 , wherein, in method step d), a gaseous heat flow at an exit orifice of the first heating unit has a greater flow rate than at an entry orifice of the first heating unit.

8. The method as claimed in claim 5 , wherein, in a method step c) a thickness of the sheetlike composite at least in a subregion of the first composite edge region is reduced by more than 40% of the thickness of the sheetlike composite.

Assignees

• Sig Technology Ag

Inventors

• Alef Ulrich
• Thomas Martin
• Leufen Richard

Classifications

• B29C66/71

  characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125) · CPC title

• B29C66/4322 Primary

  by joining a single sheet to itself (B29C66/4332 takes precedence) · CPC title

• B29C65/08

  using ultrasonic vibrations {(non-plastics element to plastics elements B29C65/645)} · CPC title

• B29C66/112

  Single lapped joints · CPC title

• B29C65/8215

  Tensile tests · CPC title