Apparatus for applying patches to a continuous web

Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With cutting – punching – piercing – severing – or tearing

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Details

93 61A, B32B 3100, B31B 100

Patent

active

040615278

ABSTRACT:
An apparatus is provided for the application of patches or other sheets of material to a moving continuous web after adhesive is applied to selected portions thereof. The patches are burst from a web of patch material along spaced cross lines of perforations, and are transferred on to the moving web so as to overlie the adhesive thereon. Two pair of spaced rolls rotatable at relatively different speeds effect bursting, with one of such pair of rolls functioning to both meter the web of patch material and to apply the cross lines of perforations. One of the other pair of rolls serves to transfer the patches on to the moving web by means of air chambers first subjected to vacuum pressure for retaining the patches on to the circumferential surface of such roll, and thereafter subjected to positive air pressure for depositing the patches in place on the moving web.

REFERENCES:
patent: 3431830 (1969-03-01), Stovall
patent: 3450009 (1969-06-01), Dohnalik
patent: 3468227 (1969-09-01), Volks et al.
patent: 3630124 (1971-12-01), Sauerman
patent: 3630125 (1971-12-01), Helm
patent: 3683756 (1972-08-01), Wilson
patent: 3745893 (1973-07-01), Helm
patent: 3801394 (1974-04-01), Alexander et al.
patent: 3853041 (1974-12-01), Lynas
patent: 3869964 (1975-03-01), Kranz
patent: 3869965 (1975-03-01), Howatt
patent: 3887414 (1975-06-01), Cohn
patent: 3894905 (1975-07-01), Ehlscheid

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