US2113413A

US2113413A - Stenciling apparatus

Info

Publication number: US2113413A
Application number: US89972A
Authority: US
Inventors: Theodore H Sloan
Original assignee: SIMPLEX ENGINEERING Co
Current assignee: SIMPLEX ENGINEERING Co
Priority date: 1936-07-10
Filing date: 1936-07-10
Publication date: 1938-04-05
Anticipated expiration: 1955-04-05

Description

April 5, 1938. T. H. SLOAN 2,113,413

' STENCILING APPARATUS Filed July 10, 1936 4 Sheets-Sheet 1 INVENTOR. TH J'Zoan,

xler A TTOR YS.

April 5, 1938.

STENCILING APPARATUS Filed July 10, 1936 4 Sheets-Sheet 2 3 9 J6 la INVNTOR. TH Sloan,

BY M? A TTOR YS.

T. H. SLOAN 2,113,413

Ap 5, 1938. T. H. sLbAN STENCILING APPARATUS Filed July 10, 1936 4 Sheets-Sheet 3 INVENTOR. THISZoan, BY 7 litil Arm? EYS.

T. H. SLOAN STENCILING APPARATUS April 5, 1938.

Filed July 10, 1956 4 Sheets-Sheet 4 INVENTOR. TH Jloqn,

A TTORN S.

I gn w-5.2% an Patented Apr. 5, 1938 PATENT OFFICE smcmme msas'rus Theodore H. Sloan, Charleroi, Pa., assignor to Simplex Engineering 0 of Delaware ompany. Iv corporation Application July 10, me. Serial No. 89.012

13 Claims. (01. 101-124) The stenciling apparatus comprising the present invention is primarily adapted for use in applying a vitreous enamel composition or paint to articles of glassware such as bottles, jars and the like and to other articles of a vitreous or ceramic nature in the lettering or decorating thereof by a stenciling process.

The principal object of the invention is to provide an apparatus of the character set forth above which, by virtue of an improved means for supporting various articles in a multitude of positions against a stencil screen to receive the decoration therefrom, is particularly well adapted for universal use in decorating the frusto-conical surfaces, such as the tapered or shoulder portions of bottles and other containers, etc., even though these portions be of extreme obtuse configuration.

Another object of the invention is to provide a stenciling apparatus having a movable swinging stencil screen, designed for engagement with the articles during the stenciling operation, which may be adjusted to swing in an arc of any desired radius of curvature to accommodate bottles or other articles having different diameters and consequently different degrees of peripheral curvature.

Yet another object of the invention is to provide a movable stencil screen assembly designed for tractional engagement with a substantially frusto-conical surface of a bottle or like article in the decoration thereof, which is so constructed that freedom of movement of the screen assembly is obtained without interference from the projecting neck portion of the bottle.

Other objects of the invention will appear hereinafter.

Referring to the accompanying four sheets of drawings:

Fig. 1 is a side elevational view of a stenciling apparatus manufactured in accordance with the principles of the invention;

Fig. 2 is a front elevational view of the apparatus shown in Fig. 1;

Fig. 3 is a top plan view of the apparatus shown in the preceding figures;

Fig. 4 is a sectional view taken substantially along the line 44 of Fig. 3;

Fig. 5 is a sectional view taken substantially along the line 55 of Fig. 4;

Fig. 6 is a perspective view of an adjustable bottle neck supporting assembly forming a part of the present invention;

Fig. '7 is a perspective view of an adjustable bracket forming a part of the present invention:

Fig. 8 is a top plan view of a modified form of stencil screen unit designed for use in applying designs of an elongated form to the articles to be decorated, and

Fig. 9 is a sectional view taken substantially along the line 8-9 of Fig. 4.

The apparatus involves in its general organization a platform or table ll having supporting legs i I. A pair of standards I 2, bolted or otherwise secured to the table ll, extend upwardly from the rear' corners thereof and support therebetween a transversely extending horizontal rock-shaft I8 which is journalled at its ends in cup-like bearings ll on the upper ends of the standards l2.

Referring now to Fig. 3, the rock-shaft l3 extends across the rear edge of the table III, is

- substantially coextensive therewith, and rockably supports theinner or rear end of an adjustablecenter stencil screen assembly [5 which is best illustrated in Fig. 4.

A forwardly extending adjustable-center squeegee assembly ii is similarly supported upon the rock-shaft [3. The assemblies l6 and I8 overlie the table "I.

An adjustable article supporting chuck assembly n is secured to the forward edge of the table it and occupies a position beneath the stencil screen, and squeegee assemblies Ii and I8, and above the level of the table ll.

The stencil screen assembly it consists of a yoke i8 (FlgsB and 4) having rearwardly diverging arms I! terminating in a pair of axially aligned sleeves 2|], integrally formed thereon, throughwhich the rock-shaft I 3 extends. The yoke I8 is centered upon the rock-shaft l3 by means of collars 2i mounted upon the rock-shaft l3 outside of the sleeves 20. The yoke I 8 is provided with a forwardly extending supporting arm 22 having a hub 23 formed on the outer forward end thereof and through which extends a longitudinal slot 24 shown in detail in Fig. 9. A depending pivot pin 25 having a square reduced portion 26 extending through the slot 24 is adjustably supported by the hub 23. An adjusting screw 21 projects through the hub 23, with which it makes threaded engagement, and into the slot 24. This screw extends into and is anchored in the square portion 26 of the pin 25 and facilitates shifting of the pin longitudinally of the machine within the limits of the slot 24.

An inverted L-shaped carrier arm 28, provided 'with a horizontal portion 29 having a hub 30 formed thereon, and a vertical portion 2| having a foot 32 at its lower end, is pivoted on the hub 23 for oscillation about the axis of the adjustable pivot pin 25, which connects the two elements.

A T-shaped support consisting of a transverse bar 33, riveted or otherwise secured medially of its ends to one end of a longitudinal bar 34, is adjustably secured to the foot 32 by means of cap screws 35, which extend through the foot and are threaded into a series of spaced threaded apertures 36 in the bar 34. Thus, the

support

33, 34, is adjustably mounted on the foot 32 and may be shifted forwardly or rearwardly as desired.

The transverse bar 33 (Fig. 3) is provided with a series of longitudinally spaced threaded apertures 31 which extend along one edge thereof.

A second series of similarly spaced, threaded apertures 38 extend along the opposite edge of the bar 33 and are preferably formed at points transversely opposed on the bar to the apertures 31 for a purpose subsequently to be described.

A pair of forwardly extending stencil screen supporting arms 39 (Figs. 3 and '1) preferably formed of wood, are adjustably secured to the bar 33 on opposite sides of the center thereof by means of relatively thick metal brackets .40, one of which is shown in detail perspective in Fig. '1. The brackets 40 are complementary in form and accordingly a description of onewill suffice for both.

The bracket 40 is provided with a slot 4| on the underneath side thereof and in which one end of the arm 39 is received and permanently secured by means of cap screws 42. Extendin completely through the bracket 40 is an arcuate slot 43 of small radius of curvature, the center of which occupies a position within the confines of the bracket. The bracket is adjustably secured at this center to the bar 33 by means of a cap screw 44 which is selectively received on one of the series of apertures 31. A clamping screw 45 extends through the arcuate slot 43 for selective reception in one of the series of apertures 38. Thus by loosening the clamping screw 45, the bracket 46 may be adjusted angularly on the bar 33 in any one of a number of positions therealong, as clearly shown by the dotted line positions of the bars 33 and brackets 40 in Fig. 3.

The stencil screen supporting arms 39 extend forwardly from the bar 33 in parallel relationship with respect to each other and support therebetween a stencil screen holder in the form of a rectangular frame 46, the opposite ends of which are secured to the arms 33 by means of attachment plates 41. The: frame 46 is provided with a sector-shaped opening 46 in the central region thereof and a silk screen or other conventional screen S having impervious and pervious portions, the latter representing the design to be stenciled on the articles, is stretched across the bottom of the opening 43 and is secured to the underneath side of the frame 46.

The inner ends of the slots 43 (Figs. 3 and '1) provided in the brackets 46 terminate at points transversely opposed on the brackets to the centers of curvature of the slots. Inasmuch as the

apertures

31 and 33 are transversely opposed in pairs on the bar 33 as previously described, the clamping studs 45 serve to limit the inward adjustment of the bars 35 to their parallel position as shown in Fig. 3 in full lines. In this manner, assembly of the screen holder 46 in position between the bars 33 is facilitated.

In Fig. 8, a modified form of stencil screen holder designed for applying designs of an elongated form to the tapered or shoulder portions of long neck bottles is shown. The holder 43 is generally of arcuate shape. the ends thereof beingprovided with straight edges 56 which are inclined with respect to each other. The frame 49 is attached to the supporting arms 38 by means of the plates 41 as shown in Fig. 8 and in dotted lines in Fig. 3.

Referring now to Fig. 4, the upper surface of the horizontal portions 29 of the carrier arm 26 has secured thereto a continuous circular ring 5|, an arcuate portion of which is seated in a groove 52 in said arm and is secured therein against circumferential shifting by a screw 53. The axis of the ring 5| coincides with the axis of the hub 30 and the ring is of sufficient diameter to place the forward portion thereof within convenient reach of the operator who, by manually engaging the same, may oscillate the entire screen assembly about the axis of the pin 25. A pair of limit stops 54 are circumferentially adjustable on the ring 5|. These stops project upwardly from the ring above the lower level of the arm 22 of the yoke member I! and are adapted to abut against this arm on either side thereof in the limiting positions of the stencil screen assembly. Thus the amplitude of the oscillation of the screen assembly may be varied.

Referring now to Fig. 3, the squeegee assembly l6 consists of a yoke 55 having rearwardly diverging arms 56, the outer ends of which carry integrally formed, axially aligned sleeves 51 through which the rock-shaft |3 extends. The sleeves are positioned on the shaft |3 outside of the sleeves 26 of the yoke l6 and the entire yoke 55 is centered upon the shaft |3 by means of collars 58. The yoke 55 is provided with a forwardly extending arm 59 which terminates in a head (Fig. 4) having a vertically extending dovetail groove 6| formed in the front face thereof.

A squeegee supporting member 62, best illustrated in Fig. 4, is provided with a vertically extending dovetail 63 which cooperates with the groove 6| in permitting vertical adjustment of the member 62 on the head 60. A series of set screws 64 permit anchoring of the member 62 in any desired adjusted position. In order to facilitate such vertical adjustment, an adjusting screw 65 carried by the member 62 is threaded into the head in such a manner that turning movement of the same in one direction or the other will cause the member 62 to be raised or lowered.

The lower end of the member 62 is provided with a foot 66 having a pair of slots 61 extending therethrough and to the lower surface of which an elongated squeegee holder 68 is adjustably clamped by means of cap screws 63 which pass through the slots 61 and are selectively received in alternate apertures of an aligned series of threaded holes 13 provided in the holder 56.

The squeegee holder 63 is provided with a longitudinal groove 1| (Figs. 4 and 5) between the walls of which a longitudinally adjustable link 12 is supported by means of a pin 13 selectively receivable in a series of aligned apertures 14. The lower end of the link 12 is bifurcated and a squeegee blade 15 is pivoted thereto for limited rocking movement between the furcations of the link 12.

The stencil screen S is normally supported in the machine in a substantially horizontal'position the exact location of which may be determined by means of a pair of adjustable limit stops 16 (Figs. 1, 3 and 4) provided on a cross-beam 11 the ends of which are supported between the standards l2. These limit stops 16 cooperate with abutments 10 formed on the underneath side of the yoke I0.

In order to initially adjust the squeegee blade II to the stencil screen 8 and to obtain the proper degree of pressure thereon, an adjusting screw 10 (Figs. 3 and 4) passing through the arm II of the yoke ",engages the arm 22 of the yoke I 0. The arm 50 of the yoke 55 is movable upwardly about the axis of the shaft I8 independently of the arm 22 of the yoke I 0. Thus the squeegee holder 05 may be manually lifted by the operator to cause the squeegee blade I! to clear the screen 8. In order to return the arm 59 to its normal screen-engaging position, a coil spring 00, centered upon a pin II carried by the arm 22 and passing through the arm 59 bears against the arm 50 at one end thereof and against a wing nut 82 at the other end thereof. Adjustment of the wing nut 82 will lessen or increase the pressure applied by the squeegee blade I5 upon the screen 8.

Referring now to Figs. 3 and 4, a series of counterweights 02 suspended from a short arm 04 'formedon one of the sleeves 51 provides a counterbaianee for the entire stencil screen assembly I 5. A treadle mechanism 81 which projects forwardly of the machine adjacent the bottom thereof in a convenient position for the operator of the machine, operates through a pair of chains 88 attached to the short arm 84 and to a short arm 00 formed on the other sleeve 51 toswing the two assemblies I5 and I6 upwardly about the axis of the rock-shaft I3 when depressed by the foot of the operator.

The article supporting chuck assembly I1 (Fig. 4) includes a casting 90 suitably secured as at 9| to the forward edge of the table I0 for vertical adjustment thereon. An integral attachment plate 02 projects forwardly from the casting 90 and a chuck supporting bar 93 is adjustably clamped to the plate 02 for angular or longitudinal axial adjustment in the apparatus.

The chuck supporting bar 93, or carrier, is shown as occupying an inclined position in the apparatus with the upper portion thereof overlying the forward portion of the table I0 and positioned beneath the screen S. A series or row of equally spaced bores 94 extend perpendicularly through the bar 93 and are adapted to selectively receive therein the lower end of a chuck supporting stem 95 which is anchored in any desired adjusted position by means of a set screw 90 which is selectively received in threaded apertures 01 that communicate with the bores 94. The stem 95 carries at its upper end a chuck bearing 98 in which a shallow cup-like article supporting chuck 09 is rotatably journalled. A yoke supporting stem I00 provided with a yoke IOI at its upper end has its lower end selectively received in the bores 94. A pair of rollers I02 rotatably Journalled on short stems I03 are adjustably mounted on the yoke IN by means of a plurality of transverse bores I04 provided in the yoke and in which the stems are selectively receivable. The stems are anchored in position by means of set screws I05.

The article B to be decorated is in the present instance in the form of a .bottle having a relatively large base portion I06 adapted to be supported on the base chuck 99 and provided with a relatively long neck portion I01. The neck portion of the bottle is supported upon the rollers I02 which are properly adjusted for this purpose.

The bottle B includes a tapered or shoulder portion I08 providing a frusto-conical surface to which the decoration is applied. When the bottle B is in operative positionin the apparatus for decoration of its frusto-conical surface, the screen 8 occupies a horizontal position and is tangent to the surface. 'Ihe parts of the apparatus are arranged so that an extension of the vertical axis of the pivot pin 2| intersects the-axis of rotation of the bottle at or very near the apex of the cone of which the portion of the bottle is a frustum.

The underneath surface of the screen 8 is brought to bear on the shoulder of the bottle by adjustment of the limit stops 11 and by making the proper selection of apertures 08 for'attachment of the T-shaped

support

33, 34. to the foot 32. When the screen 8 is properly positioned with respect to the bottle B, the neck portion of the bottle projects upwardly above the level of the screen and rearwardly thereof. Because of the vertical alignment of the axis of rotation of the screen assembly I 5 with the apex of the cone of which the portion of the bottle to be decorated is a i'rustum, the neck portion I01 will not restrict or obstruct oscillation of the screen assembly during the decorating operation.

The squeegee blade I5 is held during the decorating operation directly over the line of contact between the stencil screen S and the frustoconical surface being decorated in such a manner that proper depth of contact together with the proper degree of pressure is obtained between the squeegeeand screen. In attaining such correct positioning of the blade I5, proper selection of the apertures 10 for longitudinal adjustment of the squeegee holder, and proper selection of the apertures 14 for longitudinal adjustment of the squeegee blade is first made. Subsequently, proper elevation of the blade and correct application of pressure is eilected by manipulation of the adjusting screw 19 and wing nut 82 respectively. v

The actual stenciling operation is made in the usual manner by the application of a suitable colored vitreous enamel preparation or paint to the upper surface of -the screen and by moving the screen from one extreme position to the other as determined by the limit stops 54. During such oscillation of the screen, the stationary squeegee blade 15 forces coloring matter through the pervious portions of the screen and onto the surface of the bottle. The bottle, being rotatably supported by'the base chuck 99 and rollers I02, is caused to rotate by virtue of its tractional engagement with the stencil screen S during the movement of the latter.

Upon completion of the stenciling operation, and prior to engagement of .either limit stop 54, with the arm 22, the operator, by manually engaging the squeegee holder 68 is enabled to raise the squeegee assembly with the aid of the

counterweights

83 and 85 momentarily against the action of the spring 80 to permit the squeegee blade I5 to clear the screen 8 and enamel preparation thereon sufllcicntly to permit the enamel to pass under the blade 15 and occupy a position ahead of the squeegee for proper application of the enamel to the next succeeding bottle to be decorated.

Upon depression of the treadle mechanism 81 by the operator, the squeegee and stencil screen assemblies I8 and I5 respectively are swung upwardly about the rock-shaft I3 to ailord sufllcient clearance for removal of the bottle B'from the chuck assembly I! and for substitution of the next succeeding bottle to be decorated.

Release of pressure upon the treadle mechanism 81 by the operator causes lowering of the two assemblies l5 and 18 into operative decorating position.

Modifications may be resorted to within the spirit and scope of the appended claims.

I claim:

1. In an apparatus for stenciling an article having a frusto-conical surface, a fiat stencil screen mounted for oscillation about an axis perpendicular to the plane of said screen, a stationary squeegee in contact therewith, means for positioning an article against said screen with its frusto-conical surface in contact therewith, means operable independently of said squeegee for adjusting the position of said screen with respect to said axis to lengthen or shorten the radius of curvature of the same, and means for adjusting the position of said axis to vary the position of said screen along the line of contact between said surface and screen.

2. In an apparatus for stenciling articles having frusto-conical surfaces of different angularity, means for supporting an article so that it is free to rotate about the axis of its respective surface, a flat horizontally disposed stencil screen, means for adjusting said supporting means to bring the frusto-conical surface of said article into tangential contact with said screen, a squee gee, means for holding said squeegee in contact with said screen along the line of contact between said screen and surface, and means for adjusting said holding means to vary the depth of contact between said screen and squeegee.

3. In an apparatus for stenciling articles having frusto-conical surfaces of different angularity, means for supporting an article so that it is free to rotate about the axis of its respective surface, a flat horizontally disposed stencil screen, means for adjusting said supporting means to bring the frusto-conical surface of said article into tangential contact with said screen, a squeegee, means for holding said squeege in contact with said' screen along the line of contact between said screen and said surface, means for adjusting said holding means to shift said squeegee along said line of contact, and additional means for adjusting said holding means to vary the depth of contact of said squeegee and screen.

4. A machine for decorating the surface of an article comprising in combination, means for holding the article so that it is free to rotate about an axis, means for adjusting the angulafrity and elevation of said holding means, a screen frame, a flat screen carried thereby, means foroscillating said frame about an axis with the screen moving in its own plane in tractional rolling engagement with said surface, and means for applying decorating material through the screen to said surface.

5. A machine for decorating bottles having relatively long neck portions and adjoining frusto-conical surfaces of comparatively large an-' gularity comprising in combination, adjustable means for supporting a bottle so that it is free to rotate about the axis of its frusto-conical surface, a flat stencil. screen having one edge thereof curved, means for adijustably positioning said screen in tractional tangential contact with said frusto-conical surface with the neck portion projecting above the level of the screen in close proximity to said curved edge, and means for applying a decorating material through said screen to said surface.

6. An apparatus for decorating the frustoconical surfaces of bottles and like articles comprising a support, a horizontal rock-shaft carried by said support. a stencil screen assembly mounted for tilting movement on said rock-shaft, a stencil screen carried by said assembly and normally occupying a horizontal position in the apparatus, means for oscillating said stencil screen in said assembly in its own plane, means for supporting a bottle so that it is free to rotate about the axis of its frusto-conical surface with said surface in tangential rolling line contact with said stencil screen, a squeegee assembly mounted for tilting movement on said rock-shaft independently of said stencil screen assembly and a squeegee carried by said squeegee assembly and normally occupying a position in contact with said stencil screen.

7. An apparatus for decorating the frustoconical surfaces of bottles and like articles comprising a support, a horizontal rock-shaft carried by said support, a stencil screen assembly mounted for tilting movement on said rock-shaft, a stencil screen carried by said assembly and normally occupying a. horizontal position in the apparatus, means for oscillating said stencil screen in said assembly in its own plane, means for supporting a bottle so that it is free to rotate about the axis of its frusto-conical surface with said surface in tangential rolling line contact with said stencil screen, a squeegee assembly mounted for tilting movement on said rock-shaft independently of said stencil screen assembly, a squeegee carried by said squeegee assembly and normally occupying a position in contact with said stencil screen and means normally urging said assemblies toward each other to establish a degree of pressure between said squeegee and stencil screen.

8. An apparatus for decorating the frustoconical surfaces of bottles and like articles comprising a support, a horizontal rock-shaft carried by said support, a stencil screen assembly mounted for tilting movement on said rock-shaft, a stencil screen carried by said assembly and normally occupying a horizontal position in the apparatus, means for oscillating said stencil screen in said assembly in its own plane, means for supporting a bottle so that it is free to rotate about the axis of its frusto-conical surface with said surface in tangential rolling line contact with said stencil screen, a squeegee asembly mounted for tilting movement on said rock-shaft independently of said stencil screen assembly, a squeegee carried by said squeegee asembly and normally occupying a position in contact with said stencil screen and means for adjusting the angular position of said assemblies with respect to each other to vary the depth of contact between said squeegee and stencil screen.

9. An apparatus for decorating the frusto-conical surfaces of bottles and like articles comprising a support, a horizontal rock-shaft carried by said support, a stencil screen assembly mounted for tilting movement on said rock-shaft, a stencil screen carried by said assembly and normally occupying a horizontal position in the apparatus,

means for oscillating said stencil screen in said assembly in its own plane, means for supporting a bottle so that it is free to rotate about the axis of its frusto-conical surface with said surface in tangential rolling line contact with said stencil screen, a squeegee assembly mounted for tilting movement on said rock-shaft independently of said stencil screen assembly. a squeegee carried by said squeegee assembly and normally occupying a position in contact with said stencil screen, means normally urging said assemblies toward each other to establish a degree of pressure hescreen.

tween said squeegee and stencil screen, and means for adjusting the angular position of said assemblies with respect to each other to vary the depth of contact between said squeegee and stencil 10. An apparatus for decorating the frustoconical surfaces of bottles and like articles comprising a support, a horizontal rock-shaft carried by said support, a stencil screen assembly mounted for tilting movement on said rock-shaft, a stencil screen carried by said assembly and normally occupying a horizontal position in the apparatus,

means for oscillating said stencil screen in said assembly in its own plane, means for supporting a bottle so that it is free to rotate about the axis of its frusto-conical surface with said surface in tangential rolling line contact with said stencil screen, a squeegee assembly mounted for tilting movement on said rock-shaft independently of said stencil screen, assembly, a squeegee carried by said squeegee assembly and normally occupying a position in contact with said stencil screen and means for independently adjusting the elevation of said squeegee in said squeegee assembly.

11. An apparatus for decorating the frustoconical surfaces of bottles and like articles comprising a support, a horizontal rock-shaft carried by said support, a stencil screen assembly mounted for tilting movement on said rock-shaft, a stencil screen carried by said assemblyand normally occupying a horizontal position in the apparatus, means for oscillating said stencil screen in said assembly in its own plane, means for supporting a bottle so that it is free to rotate about the axis of its frusto-conical surface with said surface in tangential rolling line contact with said stencil screen, a squeegee assembly mounted for tilting movement on said rock-shaft independently of said stencil screen assembly, a squeegee carried by said squeegee assembly and normally occupying a position in contact with said stencil screen and means for independently adjusting the axis of oscillation of said stencil screen in said stencil screen assembly toward and away from said rock-shaft.

12. An apparatus for decorating the frusto-conical surfaces of bottles and like articles comprising a support, a horizontal rock-shaft carried by Said support, astencil screen assembly mounted for tilting movement on said rock-shaft, a stencil screen carried by said assembly and normally occupying a horizontal position inthe apparatus, means for oscillating said stencil screen in said assembly in its own plane, means for supporting a bottle so that it is free to rotate about the axis of its frusto-conical surface with said surface in tangential rolling line contactwith said stencil screen, a. squeegee assembly mounted for tilting movement on said rock-shaft independently of said stencil screen assembly, a squeegee carried by said squeegee assembly and normally occupying a position in contact with said stencil screen and means for independently adjusting the position of said squeegee in said squeegee assembly toward and away from said rock-shaft.

13. An apparatus for decorating the frustoconical surfaces of bottles and like articles comprising asupport, a horizontal rock-shaft carried by said support, a stencil screen assembly mounted for tilting movement on said rock-shaft, a stencil screen carried by'said assembly and normally occupying a horizontal position in the apparatus, means for oscillating said stencil screen in said assembly in its own plane, means for supporting a bottle so that it is free to rotate about the axis of its i'rusto-conical surface with said surface in tangential rolling line contact with said stencil screen, a q eegee assembly mounted for tilting movement on said rock-shaft independently of said stencil screen assembly, a squeegee carried by said squeegee assembly and normally occupying a position in contact with said stencil screen and means for independently adjusting the position of said stencil screen in said stencil screen assembly toward and away from said rock- 'rnnonona a. snow.