US1276439A - Coating-machine. - Google Patents

Description

L. W. SUIHERLMID.

COATING MACHHVE.

APPLICATION FILED MAY 2, 1918.

Patented Aug. 20,1918

2 SHEETS-SHEET I.

L. W. SUTHERLAND'.

COATING MACHINE.

APPLICATION man MAY 2. 1918.

Patented Aug. 20, 1918.

2 SHEETSSHEET 2.

oh \N 51mm LOU/6 m .50 THERUWD LOUIS W. SUTHERLAND, 0F KALAMAZOO, MICHIGAN, ASSIGNOR TO KALAMAZOO CARTON COMPANY, OF KALAMAZOO, MICHIGAN.

COATING-MACHINE.

Specification of Letters Patent.

Patented Aug. 20, 1918.

Application filed May 2, 1918. Serial No. 232,002.

To all whom it may concern:

Be it known that I, LOUIS W. SUTHER- LAND, a citizen of the United States, residing at the city and county of Kalamazoo and State of Michigan, have invented certain new and useful Improvements in Coating- Machines, of which the following is a specification.

This invention relates to improvements in coatin machines. I

My improvements are especially designed by me and I have illustrated the same as I have embodied and used them for the coating of cartons with paraffin, although my improvements are applicable for use in applying other liquid to sheets.

The main objects of this invention are.

First, to provide an improved coating machine by means of which sheets may be rapidly and evenly coated on both sides and at the same time one which is economical in the material consumed. v

Second, to provide an improved coating machine of large capacity.

Third, to provide an improved coating machine which is simple in its structure and operation.

Further objects, and ob'ects relating to structural details, will efinitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and ointed out in the claims.

A structure whic is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing forming a part of this specification, in which:

Figure I is a side elevation of a coating machine embodying the features of my in-- vention.

Fig. II is a detail plan view thereof.

Fig. III is a vertical central longitudinal section.

Fig. IV is a detail side elevation show ng the driving connections for the coating rollers.

Fig. V is a detail elevation showing the driving connections for a pair of coacting rollers.

Fig. VI is a detail of one of the felt covered rollers.

In the drawing similar reference characters refer to similar parts throughout the several views.

Referring to the drawing, I provide a stock or work supporting table 1 at the front of the machine. At the rear of this is a tank 2 supported by the frame 3. The tank 1s comparatively shallow and adapted to contain liquid paraffin or other coating material. The parafiin is kept in a fluid state by the heating pipes 4.. The supply tank 5 is arranged at one side of the tank and provided with a faucet 5' delivering 66 thereto so that the coating material may be kept at approximately the desired level.

I provide pairs of coacting rollers 6 and 7 These rollers are supported by blockhke bearing members 8 in the frames 9 mounted at the sides of the tank. The screws 10 are provided for adjusting the pressure of the rollers. The rollers are felt covered and are disposed so that the upper rollers of each pair are entirely above the surface of the liquid and the lower dip into the liquid, the points of contact of the rollers being substantially above the surface of the liquid so that the coating liquid is supplied to the upper rollers only through their contact with the lower.

The pairs of rollers are connected by the gears 11, see Fig. V. The lower rollers are connectedby the sprocket chain 12 and the sprocket wheels 13 on the roller shafts, see Fig. IV. A housing 14 is provided for the sprockets and sprocket chains. One of the rollers is provided with a pulley 15 connected by the belt 16 to a countershaft or other source of power.

The rear pair of rollers are positioned at the rear of the tank so as to deliver the sheets to the cooling tank 17 in which I preferably use water where the sheets are to be coated with paraflin.

Between the pairs of rollers I provide a grid-like frame formed of longitudinally spaced guide bars 18 mounted on the rods 19. These bars are arranged so that the sheets passing from the front pair of roll- 100 ers are supported and guided through the rear pair of rollers, the guide bars being located well above the surfaceof the liquid. Longitudinally spaced feed guide bars 20 similar to the'bars 18 are disposed in front of the front pair of rollers to guide the stock thereto. These bars are supported on rods 21 similar to the rods 19. These guide bars permit the excess liquid to flow freely from the rollers into the tank.

Slat-like slides 22 extend from the front end of the table to the bars 20 so that the sheets 23 may be slid along by the operator on these slides 22 -to the bars 20 which guide them to the rollers. in Contact the paraffin or other coating is distributed by the lower rollers to the upper rollers so that when a sheet is passed between the rollers it is coated on both sides, the sheets being fed at such intervals as permits the upper rollers becoming properly coated or charged with the coatingmaterial. As the rollers are driven quite rapidly the interval in practice is about such as an operator requires in successively feeding the sheets.

To carry the sheets well into the cooling liquid, which is preferably water, I provide a series of pairs of coacting feed belts 24 and 25. These feed belts are supported at their .front ends by rollers 26' and 27 and at their rear ends by the rollers 28 and 29 respectively. Both reaches of the belts pass below the guide roller 30. The lower reaches of the belts also pass below this guide roller 30 which is located well below the surface of the water so that the sheets are carried into and through the water by the belts. Guides 31 are positioned at the rear of the rear pair of coating rollers to deliver to the feed belts.

The sheets are discharged from the feed belts between the squeezing rollers 32 which are designed to squeeze the water or the main portion thereof from the sheets. These rollers are driven by the belt 33 and pulley 34 so that they also act as discharge rollers discharging the sheets to the rack 35.

The series of belts 24 and 25 are driven from the belt and pulley 37 on the shaft of the roller 28. \Vith this arrangement of parts the sheets are evenly coated and this without immersing the same in the paraflin.

The application of the coating by means of the rollers prevents the formation of any lumps, bubbles or unevenness on the sheets and provides a continuous and even though thin coating.

Having thus described my invention, what I claim as new and desire 'to secure by Letters Patent is 1. In a coating machine, the combination of a tank provided with heating means, a

The rollers being feed table disposed in front of said tank, pairs of felt covered rollers disposed so that the upper portions of the lower rollers are substantially above the surface of the liquid and their lower portions dip into the liquid in the tank, the lower pair of rollers beinri disposed at the rear of the tank to deli er the stock, pressure adjusting means for the upper rollers, longitudinal spaced guide bars disposed above the surface of the liquid between the pairs of rollers for guiding the stock from the front pair to the rear pair, and longitudinal spaced feed-bars disposed above the surface of the liquid in front of the first pair of rollers to support and guide the stock from the table thereto, and driving means for said rollers.

2. In 'a coating machine, the combination ofa tank, pairs of felt covered rollers disposed so that the upper portions of the lower rollers are substantially above the surface of the liquid and their lower portions dip into the liquid in the tank, pressure adjusting means for the upper rollers, longi-- tudinal spaced guide bars disposed above the surface of the liquid between the pairs of rollers for guiding the stock from the front pair to the rear pair, and longitudinal spaced feed bars disposed above the surface of the liquid in front of the first pair of rollers to guide the stock thereto, and

driving means for said rollers.

3. In a coating machine, the combination of a tank, a feed table disposed in front of said tank, pairs of rollers disposed so that the upper rollers are entirely above the surface of the liquid and the lower roller of each pair dips into the liquid in the tank, the points of contact of the rollers being a substantial distance above the surface of the liquid so that the coating material is applied to the upper rollers only through their contact with the lower, pressure adjusting means for said rollers, longitudinal spaced guide bars disposed above the surface of the liquid between the pairs of rollers for guiding the stock from the front pair to the rear pair, and longitudinal spaced feed bars disposed above the surface of the liquid in front of the first pair of rollers to support and guide the stock from the table thereto, and driving means for said rollers.

4. In a coating machine, the combination of a tank, pairs of rollers disposed so that the upper rollers are entirely above the surface of the liquid and the lower roller of each pair dips into the liquid in the tank, the points of contact of the rollers being a substantial distance above the surface of the liquid so that the coating material is applied to the upper rollers only through their contact with the lower, longitudinal spaced guide bars disposed above the surface of the liquid between the pairs of rollers for guiding the stock from the front my hand and seal in the presence of two pair to the rear pair, and longitudinal witnesses. spaced feed bars dis osed above the surface of the liquid in ront of the first pair 5 of rollers to guide the stock thereto, and Witnesses:

driving means for said rollers. LUELLA G. GREENFIELD,

In witness whereof I have hereunto set MARGARET L. GLASGOW.

LOUIS W. SUTHERLAND. [L- 8.]

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