US1728100A - Process for producing decorative effects - Google Patents

Description

Sept. l0, 1929. c. BURDICK PRocEss FOR PEoDUcmE` DECORATIVE EFFECTS Original Filed March 5, 1926 AWR/Vey division of an application filed by Patented sept. 1o,` 1929.

4UNITED STATES CHARLES LAURECE BURDICKVOF `LONDON', ENGLAND.

PROCESS FOR PRODUCING- DECOIRMA'IFIVIE EFFECTS.

Original application led March 5, 1926, Serial No. $12,623, and in Great Britain March 30, Divided and this application filed January 27, 1927. Serial No. 164,053.

My invention relates to a process for die tributing liquids by compressed air for certain decorative effects, and to the product thereof, the present .application being a v me March 5, 1926, Serial No; 92,623.

Ordinary .sprays which are used for distributingpaints, colours, varnishes and they like are designed to produce a very complete atomization completely covering the surface; the main object of my invention is to distribute liquids with little or no atomization and to produce lines or splashes, or both with regularity but without set design.

The viscosity of the liquid will to some extent determine the character of the results produced, but to ensure regularity (which is a very important factor for decorative effects) with any particular liquid, I have invented a new process whereby it is possible to obtain peculiar decorative effects by spraying.

The main peciall designed to carry out this. rocess form t e sub]ect of m aforesaid app ication Serial No. 92,623. n the present process compressed air impinges from several directions upon a' jet of somewhat viscous liquid in separate jets or zones of comparatively high velocity or pressure to draw it out into lines and splashes, as opposed to the ordina accoinp ished evenly over a surface by dividing or atomizing the liquid as completely as possible.

'Ihe invention comprises the process and product which are described with reference to the accompanying drawings whereof the novel features or combinations are pointed i out in the claims.

face treated thereby, showing how the liquid` falls uponthe surface in strings and splashes.

Fig. 3,2is a sectional elevation to anenlarged scale of the nozzle arrangement.

features of the apparatus es-y arrangements in which painting is dle 1 and a trigger 2 for controlling the y supply of liquid and compressed air. The liquid is contained in a reservoir 3 sup orted upon a connecting pipe 4 through w ich it is fed to the liquid nozzle 5. Compressed air is supplied to the connection 6 and through the handle 1 and air supply passage 7. A branch pipe 8 leads from the passage 7 to areducing valve 9 by means of which the air in the interior of the liquid reservoir is maintained at a predetermined or adjustable pressure. The cover 10 of the reservoir is suitably clamped down -by screw 11, or the reservoir is otherwise made pressure-tight for this pur ose. Alternatively the presssure-feed of the liquid may be obtained by the head "of liquid,- the reservoir then being preferably fixed at a suitable height and flexibly connected to the apparatus.

For the control of the liquid at the delivery port or nozzle 5 I employy the usual pin valve 12 which would be manipulated by a lever, preferably the usual finger lever 2 designed to control both the air valve and the pin valve.

The delivery port for the air, surrounds the liquid discharge port ,5, but in place of the usual construction designed for only a narrow air passage around the liqu 1d d1s charge port I provide a series'of openings` 13 so that the air will be divided up into a number of jets, which, impinging' on the liquid from different radial points tend to draw out the liquid in lines and splashes.

It is very important, however, to secure a uniform current of air around the dischar e tip, and A,to effect this I provide within t e air cap or nozzle -an equalizing compressed air chamber 14 and a series of inner outlets from this, which delivers the air to the outer ports at a practically uniform pressure for each port all round the liquid discharge port. Slight clearances 15, 15 where the nlpple 16 and cap 1,7 are connected also assist in pressure equalization and distribution of the compressed air at the outlet.L u The separate jets emerging from tle orlfices 13 all strike the li uid jet separatelytended so as to form an annular port 18 sur-l rounding the vliquid delivery nozzle, but in sucha case the area of the port 18 must be comparatively very large, as the separate air jets mustnot be permitted or caused to merge into a uniform annular jet, but must in all cases remain as air-pressure zones. f

The compressed air may be supplied to the apparatus shown at a pressure in the neighbourhood of 20 to 30 lbs. per square inch, but the pressure in eachcase will of course depend upon the design of the apparatus and thenature of the liquid. Using a liquid of the nature of a varnish paint, the reducing valve 9 might be set to give a pressure in the neighbourhood of 10 lbs. per square inch. In operation the liquid emerging from the nozzle is drawn out b the converging streams of air into threas or strings which fall upon the surface being treated with surprisingly uniform decorative eiect'but in a peculiar vdiversity of thickness and arrange- ,ment as roughly indicated in Fig. 2.

The same surface may be treated iirst with liquid'of one colour and subsequently with a different colour or different colours and a variety of effects may thus be. obtained for many diierent purposes. It isto be understood that the expression air includes all suitable gases or gaseous mixtures.

The present application 1s .limited to the process and product claimed, the' orm 'of apparatus illustrated and serving to carry out the process forming the subject matte of copending application Serial No. 92562 In using the apparatus shown or similar apparatus, the operator swings the nozzle from side toside moderately quickly at the same time moving it down or along the surface to be decorated, and very little practice indeed is required to obtain sufiicientuniformity in the amount of decoration applied to each unit of area. At the same time, there is no for- 55' mal pattern or repeat and there is thus no tendency for vthe decoration tobecoin'e monotonous.

I claim 1. A rocess of producing decorative efects w ich consists in causing compressed air delivered as independent jets to impinge from numerous directions in air-pressure zones upon a jet -of somewhat viscous Huid to draw and tear it out into threads and distribute is'upon a surface.

A process of producing decorative elffects which consistsl in causing compressed air to impinge from numerous dlrections in symmetrically arranged independent air-` pressure zones upon a jet of somewhat viscousV iiuld to draw and tear it out into threads and distributeit upon a surface.

3. A process of producing decorative efy fects which `consists in causing 4compressed air to impinge from numerous directions in the form of se arate jets upon a jet of somewhat viscous uid pigment to draw and tear it out into threads and distribute them upon a surface in lines andvsplashes, and permitting the pigment to harden upon the surface.

4.A' process of producing decorative effects which consists in causing compressed symmetrically arranged separate jets upon a 'jet of somewhatl viscous fluid pigment to draw and tear it out into threads and distribute them upon a surface in lines and splashes, and permitting the pigment to harden upon the surface.

In testimony whereof I ahix my signature.

CHARLES LAURENCE BURDICK.

' air to impinge from' numerous directions in

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