Coating processes – Coating remains adhesive or is intended to be made adhesive – Heat sensitive adhesive
Patent
1982-03-23
1983-12-13
Lawrence, Evan K.
Coating processes
Coating remains adhesive or is intended to be made adhesive
Heat sensitive adhesive
118702, 118703, 118704, 427244, 427286, B05D 510
Patent
active
044205104
ABSTRACT:
A method of uniformly applying a foamed adhesive to a normally moving substrate which is subject to stops and starts at irregular intervals. A uniform spread weight of adhesive is applied during a deceleration period and startups can be accomplished without causing puddles or gaps. The method is especially useful in conjunction with an automated plywood lay-up line. Foamed adhesive is supplied under pressure to an extrusion head. When a line stoppage is sensed a first valve above the extrusion head closes. Adhesive within the head continues to expand and fall onto the substrate, but does so at a descreasing rate during the deceleration time. As the substrate comes to a complete stop a second valve prevents further adhesive from being applied. Before a startup, the adhesive in the system is reconditioned by passing it into a recycle line until foam quality andpressure drop across the extrusion head have again assumed normal operating parameters. Only then is the substrate movement started. At that time application of adhesive is resumed.
REFERENCES:
patent: 2695246 (1954-11-01), Jurgensen, Jr. et al.
patent: 2734224 (1956-02-01), Winstead
patent: 3081069 (1963-03-01), Oakes
patent: 3381336 (1968-05-01), Wells
patent: 3895984 (1975-07-01), Cone et al.
patent: 3905329 (1975-09-01), Cone et al.
patent: 3905921 (1975-09-01), Cone et al.
patent: 3965860 (1976-06-01), Cone et al.
patent: 4258088 (1981-03-01), Cone et al.
Ziegler, J. L., Mechanized Foaming of Adhesives, Forest Products Journal, 9: pp. 233-235, Jul. 1959.
Cone, C. N., Foam Extrusion-A New Way of Applying Glue, Forest Products Journal, 19(11): pp. 14-16, Nov. 1969.
Kunkel Arden L.
Pierson Darrell E.
Lawrence Evan K.
Weyerhaeuser Company
LandOfFree
Method for applying a foamed adhesive under start-stop condition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for applying a foamed adhesive under start-stop condition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for applying a foamed adhesive under start-stop condition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-804291