Method and device for producing tear-off lids and tear-off lid
AssigneeSoudronic AG
InventorsPascal Gauch, Peter Taiana
Life of this patent
Estimating the term…
Abstract
A tear-off lid with a curled edge of the removal opening is formed such that before the edge is curled, a plastics layer provided as a band of low thickness and preferably only 0.1 mm thickness is applied to the collar of the lid ring. In this way, a good seal of the cut edge of the tear-off lid is produced economically and with the possibility for production at a high rate.
Claims8
An apparatus for producing tear-off lids having upper and lower sides to which lids on the upper side thereof, a tear-off film is sealed onto a sealing surface which is arranged around a removal opening of the lid, the apparatus comprising a conveying device for lid blanks, lid rings and tear-off lids as well as processing stations which are provided in a conveying direction (A) one after another for processing the lid blanks, lid rings and tear-off lids, wherein a first processing station is provided as a punching station for forming a lid ring from the lid blank, a second processing station is provided for forming a collar of the lid ring, extending from a lower side of the lid ring, and a third processing station is provided which is configured for curling the collar toward the tear-off lid upper side and outwardly, and further at least one sealing station is provided which is configured for sealing a tear-off film onto the sealing surface, wherein the conveying direction between the second processing station for forming the collar and the third processing station for curling the collar, a further processing station is provided which is configured as a coating station for applying a peripheral, endless plastics layer of even thickness on the inside of the collar, and in that the third processing station is configured for curling such that the curl comes into contact with the plastics layer.
Dependencies are inferred from the claim text.