Abstract The present device provides a means for applying thin coatings of material to sheet items or webbing material. The invention will be described in connection with the application of a pressure-sensitive adhesive to sheet or webbing material, wherein the adhesive compound employs a solvent to keep it in a fluid state, thus enabling the adhesive to be worked without being heated. In accordance with the design principles of the present device, the adhesive mixture containing solvent is held in a reservoir and is kept from evaporating from said reservoir by employing a cover which seals the applicator member and hence the reservoir from the atmosphere which surrounds the housing, when there is no sheet material being processed. However the sealing cover is movably positioned away from the path along which the sheet or webbing material passes in contact with the applicator when the device is in use. In addition the path for the sheet material is arranged so that the ''''adhesive side'''' of the sheet is facing up as the sheet material leaves the machine, thereby enabling the user to support or carry the sheet by coming in contact with the nonsticky undersurface.
A device for applying coating material according to claim 1 wherein said coating material is an adhesive material including an evaporable solvent.
Claim 2
Dependent Claim
34 words
A device for applying coating material according to claim 2 wherein there is included heater means disposed in proximity to said sheet transport means to drive off an evaporaBle material in said coating material.
Claim 3
Dependent Claim
42 words
A device for applying coating material according to claim 3 wherein there is further included electrical switching means which operates in response to sheet material passing through said transport means so as to automatically move said sealing cover to said second position.
Claim 4
Dependent Claim
47 words
A device for applying coating material according to claim 4 wherein said electrical circuitry means includes means to provide electrical energy so that said sealing cover is held in said second position until after said sheet means which initiated said action has been transported through said device.
Claim 5
Dependent Claim
55 words
A device for applying coating material, according to claim 1 wherein there is further included picker knife means mounted within said housing means and disposed to protrude from said aperture whereby when said applicator means is in contact with webbing material said picker knife means serves to separate said webbing material from said applicator means.
Claim 6
Dependent Claim
51 words
A device for applying coating material in accordance with claim 1 wherein there is further included a doctor blade means disposed in close proximity to said applicator means whereby said doctor blade means determines the thickness of the layer of adhesive means which said applicator means is lifting on its surface.
Claim 7
Dependent Claim
100 words
A device for applying coating material in accordance with claim 1 wherein there is further included a sheet transport means formed to pass sheet material in close proximity to said applicator means when said sealing means is in said second position so that said sheet material comes in contact with said applicator means and further formed so that the side of said sheet material which does not come in contact with said applicator means leaves said transport means facing away from the base of said housing means whereby said sheet material can be handled without having the handler become sticky.
Claim 8
Dependent Claim
34 words
A device for applying coating material according to claim 1 wherein said applicator means is a roller which is mounted on a rotatable shaft and wherein there is included means to rotate said shaft.
Claim 9
Dependent Claim
36 words
A device for applying coating material in accordance with claim 9 wherein there is further included mechanical means to move said sealing cover simultaneously with the rotation of said shaft upon which said roller is mounted.