Abstract Thermoplastic adhesive which has a tendency to form threads is applied to an article and, after terminating the supply of adhesive, the dispensed but not yet applied portion of adhesive is wiped on part of the article that is as yet free from adhesive. Apparatus for performing this method comprises a rotary cam for projecting an adhesive-applying nozzle towards successive articles moved past the nozzle and then retracting it again. The rotary cam has a first cam track portion governing retraction of the nozzle, a second cam track portion governing projection of the nozzle and an intermediate cam track portion for projecting the nozzle still further, control means being provided for opening valve means when the nozzle is in the projected position governed by said second cam track portion and closing the valve means during said still further projection of the nozzle.
Inventors
👤 Fritz Achelpohl
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-09 15:53
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
Apparatus for applying adhesive to a moving article comprising a nozzle through an orifice of which the adhesive is applied as the article passes it, a first rotary cam and follower means for projecting the nozzle towards the article for application of adhesive and retracting it again, and valve means for opening and closing the nozzle orifice, wherein said first rotary cam is provided with a cam track comprising a first cam portion governing retraction of the nozzle, a second cam portion governing projection of the nozzle and a third cam portion disposed between said first and second cam portions for projecting the nozzle still further, control means being provided for opening said valve means when the nozzle is in the projected position governed by said second cam portion and closing said valve means during said still further projection of the nozzle.
Claim 2
Dependent Claim
142 words
Apparatus for applying adhesive to a moving article comprising a nozzle through an orifice of which the adhesive is applied as the article passes it, a first rotary cam and follower means for projecting the nozzle towards the article for application of adhesive and retracting it again, and valve means for opening and closing the nozzle orifice, wherein said first rotary cam is provided with a cam track comprising a first cam portion governing retraction of the nozzle, a second cam portion governing projection of the nozzle and a third cam portion disposed between said first and second cam portions for projecting the nozzle still further, control means being provided for opening said valve means when the nozzle is in the projected position governed by said second cam portion and closing said valve means during said still further projection of the nozzle.
Claim 3
Dependent Claim
22 words
Apparatus according to claim 1, wherein said control means comprise a second rotary cam rotatable in synchronism with said first rotary cam.
Claim 4
Dependent Claim
17 words
Apparatus according to claim 1 including means for closing said valve means independently of said control means.
Claim 5
Dependent Claim
17 words
Apparatus according to claim 1 including means for retracting the nozzle independently of said first rotary cam.