Apparatus for connecting a tear-open strip with a film web
AssigneeFocke & Co. (GmbH & Co.)
InventorsHeinz Focke, Johann Koster
Life of this patent
Estimating the term…
Abstract
Sealing rollers (23, 24, 25) serve for connecting tear-open strips with a film web (10) by applying heat and pressure, the sealing rollers (23, 24, 25) resting against the film web (10) in the region of the tear-open strips. Opposite of the sealing rollers (23, 24, 25) there are positioned counter rollers which make it possible to transfer pressure by means of the sealing rollers (23 to 25). The sealing rollers (23 to 25) are heated, specifically by radiant heat from a heated housing (31), which serves as a carrier for the sealing rollers (23, 24, 25).
Claims6
An apparatus for connecting a continuously fed elongated tear-open strip (12, 13) with a continuously fed film web (10) for the production of blanks for pack wrappings with tear-open strips, the film web (10) and the tear-open strip (12, 13) being connected to each other by heated sealing (23, 24, 25) and counter (27, 28, 29) rollers which are rotated in accordance with a conveying movement of the film web (10) and the tear-open strip (12, 13), wherein:
- the sealing rollers (23, 24, 25) are rotatably mounted, with an axial spacing from one another, in a housing (31) made of a material with high thermal conductivity;
- the housing (31) is heated by at least one heating cartridge (33) disposed in the housing (31);
- disposed between adjacent ones of said sealing rollers (23, 24, 25) and in a region of outer ones of said sealing rollers (23, 25) are heat transfer members in the form of wide webs (46) of thermally conducting material which extend in the longitudinal direction of the tear-open strip (12, 13) and are heated by the housing (31);
- the webs (46) end at a distance from the tear-off strip (12, 13);
- and
- the webs (46) conform to the contour of the sealing rollers (23, 24, 25).
Dependencies are inferred from the claim text.