Spraying Systems Co.

H.b. Fuller Company

H.b. Fuller License and Finance Inc.

Paul David Wanthal

James Haruch

Mutombo Joseph Muvundamina

A liquid adhesive dispensing system operable for more uniformly applying liquid adhesive foam onto moving substrates, notwithstanding changes in line speed, adhesive liquid flow rates, or foaming/atomizing air pressures. The illustrated liquid adhesive system includes a header having a plurality of air atomizing spray guns; the spray guns each having a respective variable speed positive displacement pump for directing a metered quantity of liquid adhesive from a liquid adhesive supply to the respective spray gun; and a control for controlling the operating speed of the positive displacement pumps in relation to the speed of the moving substrate and the foaming/atomizing air pressure to the spray guns in relation to the operating speed of the positive displacement pumps. The control further is operable for monitoring pressures across the positive displacement pumps for insuring the accurate direction of metered quantities of liquid to the spray guns. The spray guns are adapted for enhanced liquid adhesive foaming and atomization, and the header is convertible into a closed housing structure effective for containing cleaning and purge liquids during an automatically operable cleaning cycle of operation.

Liquid adhesive dispensing system

A self cleaning header assembly for use within a spray application system includes a plurality of spray guns for spraying a mix of air and liquid, e.g., an adhesive, and comprises a cleaning mechanism including one or more wash nozzles and a shroud. During a cleaning cycle, the shroud is closed and the spray guns rotate to approach the wash nozzles. The wash nozzles apply pressurized liquid, e.g., water, to the spray gun nozzles to remove excess adhesive that may affect the spray pattern and flow. After the washing cycle is complete, the spray guns are rotated to again face the target of interest and the shroud is reopened.

Growing community of inventors

Bartlett, IL, United States of America

Paul David Wanthal