US3396872A

US3396872A - Powder dispenser for printed webs

Info

Publication number: US3396872A
Application number: US543936A
Authority: US
Inventors: George V Wheeler
Original assignee: George V. Wheeler
Current assignee: GEORGE V WHEELER
Priority date: 1966-04-20
Filing date: 1966-04-20
Publication date: 1968-08-13
Anticipated expiration: 1985-08-13

Description

173', 1968 cs. v. WHEELER 3,396,872

POWDER DISPENSER FOR PRINTED WEBS Filed April 20, 1966 NU ENTO K GEORGE WHE'EZEIQ (E 0 E Q av United States Patent 3,396,872 POWDER DISPENSER FOR PRINTED WEBS George V. Wheeler, 1212 E. Henry Clay St., Milwaukee, Wis. 53211 Filed Apr. 20, 1966, Ser. No. 543,936 1 Claim. (Cl. 222-193) ABSTRACT OF THE DISCLOSURE A container disposed above a printed web holding a quantity of powder over a roll which rotates and deposits the powder on the web below, and the container held powder is in contact with the roll between a doctor blade of resilient material and a strip of shim stock set to allow a certain amount of powder to pass between said strip and the roller, and an adjacent apertured tube emitting compressed air to blow said powder against the web.

This invention relates to improvements in powder dispensers for printed webs, and is an improvement on my invention disclosed in a prior application bearing the Ser. No. 453,427, now US. Patent No. 3,305,141, and filed in the US. Patent Oflice on May 5, 1965.

An object of the invention is to provide a device of the type which will distribute powder more evenly on a printed web than has been possible with apparatus of the same character in prior use.

Another object of the invention is to provide a compressed air tube having a plurality of aligned air discharge orifices of novel design yielding increased capability in uniformity of powder distribution.

Other and further objects of the invention will appear as the description proceeds, reference being had to the accompanying drawing, in which:

*FIG. 1 is an end view partly broken away of a powder dispenser embodying the invention.

FIG. 2 is a front view partly in elevation and partly in section.

FIG. 3 is a cross-sectional view taken on line 3-3 of FIG. 2.

FIG. 4 is a plan view of the device partly broken away.

FIG. 5 is a fragmentary inverted view of the air distribution tube.

FIG. 6 is a cross-sectional view taken on line 66 of FIG. 5.

In the drawing, the dispenser 10 has a top 11, a rear wall 12,

end walls

13 and 14, and the frontal wall 15.

A transverse angle member 16 depends from the top 11 and has secured thereto by threaded means 17, the flexible curvate blade 18, formed of two thousandths shim stock, which bears against the top of the roller 19. A second transverse angular member 20 has one portion 21 thereof afiixed to the rear wall 12 with the other 3,396,872 Patented Aug. 13, 1968 portion 22 thereof projecting downwardly at an acute angle, and having subjoined thereto the relatively thick resilient strip 23 retained with a transverse strap 24 thereunder by threaded means 25.

The free edge 26 of the strip 23 is beveled at 27 and bears against the roller 19, serving to retain the powder contents 28 prior to its movement under the blade 18 during the rotation of the roller 19.

A transverse tube 30 is connected with a source of compressed air and has a plurality of aligned apertures 31 longitudinally disposed therein. As shown in FIG. 6, the apertures 31 are exteriorly countersunk as at 32, resulting in Wider diffusion of the projected powder 28.

The resilient element 23 also serves to remove any accumulation on the roller 19 during the rotation of the latter. The element 18 is set during manufacturing assembly to permit passage on the roller 19 of just the correct amount of powder 28, and the compressed air emitted through the countersunk apertures 32 will distribute said powder over the printed web 33.

A motor 34 coupled with a gear reducer 35 operates the shaft 36 provided with sprocket 37 connected by chain 38 with the sprocket 39 mounted on the shaft 40 connected with the roller 19 for rotation of the latter.

Having thus described the invention, it will be understood that the device is capable of many modifications in structure and design, without departing from the spirit of the invention, within the scope of the appended claim.

What is claimed and desired to be secured by Letters Patent of the United States is:

1. A device of the character described including a hopper for powdered material, a roller mounted therein, an elongate angle member within the top of said hopper over said roller, a curvate blade of shim stock fixed to a vertical face of said angle member and bearing against the top of said roller to limit the quantity of powder passing therethrough during rotation of said roller, a resilient strip held in parallel and laterally of said roller, a bevelled free edge thereof bearing against said roller to free it of any accumulation of powder thereon as it rotates, and a compressed air tube disposed above one side of said roller having a plurality of aligned externally countersunk apertures for blowing powder downwardly off said roller onto a web moving thereunder.

References Cited UNITED STATES PATENTS 3,114,482 12/ 1963 Dunaway 222548 X 3,221,938 12/1965 Yonkers et al. 222-194 X 3,238,919 3/1966 Meyer 1014l6 X ROBERT B. REEVES, Primary Examiner.

F. R. HANDREN, Assistant Examiner.