| (57) A method of producing a succession of self-adhesive labels on a length of release
material, which method comprises the steps of:-
(a) applying a layer of pressure-sensitive adhesive to a surface of a length of release
material (2);
(b) applying a succession of individual folded sheets (10) to the layer of pressure-sensitive
adhesive so as to adhere the folded sheets to the release material, each folded sheet
having an upper panel and a lower panel;
(c) applying to the succession of folded sheets on the release material a web (14)
of a self-adhesive laminar material whereby the laminar material is adhered by the
self-adhesive surface thereof over the succession of folded sheets;
(d) cutting (17) through the laminar material, the folded sheets and the pressure-sensitive
adhesive as far as the release material thereby to form the self-adhesive labels,
the cutting step being carried out whereby the upper panel of the folded sheet with
the laminar material adhered thereto can be pulled away from the lower panel thereby
to open the label; and
(e) removing from the release material waste portions of the laminar material, of
the folded sheets and of the pressure-sensitive adhesive which surround the self-adhesive
labels. The invention also relates to self-adhesive labels.
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