Abstract In an applicator for controllably applying a liquid substance such as glue to a workpiece, there is provided a pickup roll, a reservoir for supplying such roll, means for retaining the workpiece in momentary or moving association with such roll for transfer of the liquid substance thereto, a doctor blade including a shoe element for continuously wiping the roll, a resilient arm such as a leaf spring attached to the shoe, and means for deformably biasing such arm to control the pressure of the shoe against the roll. The blade assembly is compact, is readily adjustable for application of a changeable but constant force to the shoe, and is insensitive to ''''freezing up'''' or other impairment such as by spillage or gradual depositing of such substance thereon.
In an applicator wherein there is provided a plurality of pickup rolls rotatable about a common axis and spaced apart in the axial direction, such rolls being adapted to rotationally dip into a reservoir containing a fluid to be applied, means to retain a workpiece in association with such pickup rolls for transfer of such fluid thereto, the improvement of which comprises, a self-adjusting doctor blade assembly associated with each such pickup roll, and each comprising a shoe element, a resiliently deformable arm means retaining such shoe element in wiping association against the surface of revolution of such pickup roll, and means to deformably bias such arm means to resiliently urge such shoe element into following relationship against such surface.
Claim 2
Dependent Claim
120 words
In an applicator wherein there is provided a plurality of pickup rolls rotatable about a common axis and spaced apart in the axial direction, such rolls being adapted to rotationally dip into a reservoir containing a fluid to be applied, means to retain a workpiece in association with such pickup rolls for transfer of such fluid thereto, the improvement of which comprises, a self-adjusting doctor blade assembly associated with each such pickup roll, and each comprising a shoe element, a resiliently deformable arm means retaining such shoe element in wiping association against the surface of revolution of such pickup roll, and means to deformably bias such arm means to resiliently urge such shoe element into following relationship against such surface.
Claim 3
Dependent Claim
12 words
The applicator of claim 1 wherein such arm means comprises spring metal.
Claim 4
Dependent Claim
13 words
The applicator of claim 1 wherein such arm means comprises a leaf spring.