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Method and device for producing tear-off lids and tear-off lid

A technology of equipment and cover rings, applied in the field of tear-off covers, which can solve the problems of insufficient protection of cutting edges and achieve the effect of optimizing adhesion and avoiding corrosion

Inactive Publication Date: 2019-10-22
SOUDRONIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In rare cases, however, insufficient protection of the cut edges can also occur in this known method

Method used

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  • Method and device for producing tear-off lids and tear-off lid
  • Method and device for producing tear-off lids and tear-off lid
  • Method and device for producing tear-off lids and tear-off lid

Examples

Experimental program
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Effect test

Embodiment Construction

[0032] refer to Figures 1 to 11 The manufacture of tear-off lids known to the skilled person according to the prior art is briefly described. figure 1 The cover blank 1 is shown. In manufacturing facility 20 ( Figure 11 ) shows a stack 12 comprising a plurality of such cover blanks which are removed one by one from the stack and processed along the transport path through different processing stations, where the cover blanks are first formed The lid ring and the lid ring are then further processed until the finished tear-off lid. The cover blank is, for example, a disk made of coated and thus corrosion-resistant metal, such as coated tinplate. figure 1 The coating on the underside in the upper part is usually different from the figure 1 Coating of the upper side of the blank 1 located below. The blank has a diameter of, for example, 11 cm and has already been preformed at its edge 6 by a processing machine not shown, and the configuration of the edge 6 is used to secu...

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Abstract

The invention relates to a tear-off lid (10) having a rolled-up region around the removal opening (15), which tear-off lid is formed in such a way that, before the rolled-up region is formed, a plastic strip (32) of small thickness is applied to the collar (4) of the lid ring. After the rolled-up region has been formed, the plastic strip (32) is melted in order to produce good adhesion of the plastic to the top side and the bottom side of the tear-off lid (10) in the rolled-up region. A practically hermetic seal of the cut edge (31) of the tear-off lid (10) is thus achieved economically and with the possibility of production at a high rate. The invention further relates to a method and to a device for producing such a tear-off lid.

Description

technical field [0001] This patent document claims priority from Swiss patent application 0536 / 17 filed April 21, 2017, the entire content of which is hereby incorporated by reference. [0002] The invention relates to a method for producing a tear-off lid according to the preamble of claim 1 . The invention also relates to a device for producing tear-off closures according to the preamble of claim 9 and a tear-off closure according to claim 15 . Background technique [0003] Tear-off lids are known, for example, from DE-U 298 17 592 or DE-U 92 03 953 . If a container closed with a tear-off lid contains liquid corrosive contents such as salt water, the exposed cut edge of the lid opening may corrode. In the case of tear-off lids with so-called retort-curls, a certain protection from the contents can be produced by rolling the area with the cut edge upwards and outwards and covered by the tear-off film. Also, cut edges that are bare or that may corrode are not visible. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D51/38B21D51/44B21D51/46
CPCB21D51/383B21D51/443B65B51/10B65D17/502B65D2517/0013B65D2517/5008B21D51/44B21D51/46Y10T29/49826Y10S72/715B65B7/2878B65B7/285
Inventor P·泰阿纳M·奥伯霍尔策
Owner SOUDRONIC