Apparatus for applying adhesive to a running web of wrapping material for smokers products

Apparatus for supplying a series of discrete perforated uniting bands of tipping material to a filter cigarette machine, comprising:

• means for advancing in a predetermined direction and along a predetermined path an elongated web which consists of tipping paper and is provided with a series of perforated first sections alternating with non-perforated second sections;
• means for applying a flowable adhesive to successive second sections of the web in a first portion of said path;
• means for severing the web across successive second sections of the web in a second portion of said path downstream of said first portion to thus convert the web into a succession of discrete uniting bands;
• at least one first sensor adjacent a third portion of said path upstream of said second portion and arranged to generate first signals denoting detection of successive first sections of the web;
• at least one second sensor arranged to monitor the frequency of severing the web in said second portion of said path and to generate second signals denoting the frequency of severing the web;
• control means including means for comparing said first and second signals;
• and
• means for temporarily altering the speed of advancement of the web when a comparisons of said first and second signals reveals deviations outside of a predetermined range;
• at least one third sensor arranged to generate third signals denoting the frequency of application of flowable adhesive to successive second sections of the web;
• means for comparing said third signals with said first signals;
• and
• means for temporarily altering the frequency of application of adhesive to the second sections of the web based on a comparison of said first and third signals.