US1069033A - Apparatus for recovering vehicles used in application of lacquer, japan, and other coatings. - Google Patents

Description

W. 's. ROWLAND.

APPARATUS FOR REGOVERING VEHICLES USED IN APPLICATION OF LAGQUER, JAPAN, AND

OTHER COATINGS. A

Patented July 29, 1913.

AI'PLIGAT ION FILED MAR. l, 1910.

'ferred form of the apparatus I UNITED STATES PATENT OFFICE.

WILLIAM shutout. ROWLAND, or NEW BRITAIN,

STANLEY wonxs, or NEW BRITAIN,

NECTICUT.

comvnorrcur, Assronon To THE comvncrrcu'r, A CORPORATION or con- ArrAnA'rus FOR nncovnnmc vnmcnas nsnn INArPLICATIoN or LACQUER, JAPAN, AND ornnn commas.

Specification of Letters Patent.

Patented July 29, 1913.

Application filed March 1, 1910. Serial No. 546,732.

To all whom it may concern Bert known that I, WILLIAM S. ROWLAND, a citizen of the United States, residing at New Brltain. county of Hartford, State of Connecticut, have invented certain new and useful Improvements in .Apparatus for Recovering Vehicles Used in Application of Lacquer, Japan, and other Ooallngs, of which the following is a full, clear, and exact description.

My invention relates to a means and process for the recovery of the vehicle or solvent used in the a-pplica-tion'of lacquer, japan and other coatings to material or manufactured articles.

The objectof the invention is to secure economy.

In the accompanying drawings Figure 1 is a conventional showing of my improved apparatus, said view beinpartly in section. larged and showing conventionally one of the features of construction.

In the drawing-1 conventionally represents what I mayterm a kiln or drying chamber. 1

2 is a conventional representation of a condenser of any suitable form.

3 represents a blower, pump or exhauster,

or equivalent means, so associated with the kiln and condenser as to operate in a manner to cause the vapors in the kiln to flow to the condenser. In the particular apparatus shown this blower 3 is placed between the kiln chamber 1 and the condenser 2 and located in a suitable conduit 4.

1 4 are openings in and near one end of the pipe 4; arranged to receive the vapors,

these openings being disposed in any suitable location best purposes. v

2 represents the point where the conduit or pipe 4 is connected with the condenser 2.

As isindicated, the kiln chamber 1 is bounded by a suitable wall 5. In the preprovide another chamber 6 which I will term the dipping chambe-r wherein the application of the material to the articles to curs. t

7 conventionally represents a partition which preferably separates the chambers 1 an 6.

adapted for the intended exit of the good 'the entrance and exit passages in the outer tively ti ght,v while,

Fig. 2 is a detail View, slightly en-- be coated oc- In the particular form of my invention shown herein. 8 represents a belt or chain .conveyer upon which the articles tobe coated. may be placed or hung at some conven-lentpoint' outside of the apparatus and by WhlCh said articles are conveyed first into the dipping chamber 6, where said articles may be lowered into a dipping tank 9, and then passed on over a dripping board 11 into the kiln chamber 1, wherein the articles are dried. Suitable passages trapped in any suitable way are provided in the walls of the chambersto permit the entrance and and it is preferred that walls of the chamber should be comparaas will later be seen, this is of no material consequence as to the passages in the partition 7, where the means for accelerating the drying is such as later described. 7

10 represents conventionally one length of a heating coil located in the chamber 1, which serves as one means for accelerating the drying of the goods within the kiln chamber 1 by raising the temperature therein. Obviously, other suitable means may be substituted in place of said heater.

Traps may be located at whatever positions it is desirable to have them, and I- have shown in F ig. 2 conventionally one of the many forms of traps which may be employed, in which 12 represents the revolving shutter element thereof protectingthc entrance passage through the wall 5. Since I lay no claim to any specific trap construction, a further description thereof is needless.

In theprocess of covering material or manufactured articles with lacquer, apan andothersimi'lar coatings, an appropriate solvent or vehicle is employed, which upon evaporation leaves upon the material or articles the desired coating, prevlously dissolved and rendered fluid by the aforesaid solvent or temporarily thinned by the aforesaid vehicle to facilitate. application. In other words, it should be understood that the coating mixture consists-broadly of two principal elements, viz., the material which isto be retained upon the article and the vehicle (frequently a solvent) by which said material is'temporarily thinned for the purposes of application. The vehicle or,

4 indeed,

be suitably gated, if desired.

solvent is therefore in the majority of cases only a temporary expedient and in such in stances is permitted, or made to, evaporate. Heretofore, the vapors have become lost and dissipated whereas by my process it is the intention that these vapors shall be recovered and retained whereby great economies are effected. In the apparatus such as shown the wall 5 constitutes as tight an in-' closure as possible, and while not necessarily air-tight, it is nevertheless constructed with as few openings as possible to provide for the properentrance and exit of the articles to-be coated, which openings may The blower 3 preferably provides a means for continuous exhaustion of the kiln chamber, thereby creating a very slightly reduced pressure therein. In this way any draft through the openings which provide entrance and exit for the goods is in a direction to prevent the escape of vapor or gas caused by evaporation within the chamber or chambers.

From the foregoing it will be seen that when the apparatus is in'use the volatilized or gasified solvent or vehicle is restrained within the aforesaid chambers and is permitted to escape only through the aforesaid pipe 4, which conducts said volatilized or .gasified element to the condenser wherein it is transformed to a liquid state, in which latter form it may be retained and preserved for further use;

It isapparent that when this process is practised on a substantial scale great commercial economies heretofore unattained are secured.

It should be understood that my process broadly should not be limited to the employment of any particular apparatus, and

paratus claimed that a separate dipping chamber be associated with the kiln chamber. It is however very desirable that an apparatus embodying the elements broadly speaking referred to herein be employed for tice of the process and method described, and that various modifications ma be resorted to without departing from t e spirit or scope of the invention.

What I claim is: 1. An apparatus for the recovering o it is not'essential to the broad ap-.

uid form,

during said heating,

solvents used as a vehicle for coating mania factured articles with japan, lacquer or other coating, comprisinga kiln for heating the coating material and driving ed and. confining the vapor of the solvent thereof, in combination witha carrier extending partially within said kiln and by which the articles to be coated are passed through said kiln,

a tank containing the coating material so placed relatively to the carrier that the articles to be, coated may be passed therethrough before; entering the kiln, an in closure for the space in which said tank may be placed and within which inclosure the coated articles may be allowed to drip be fore entering the'kiln, said inclosure being arranged adjacent to' the kiln and connected therewith by a passage, trapped passages for allowing the articles on the carrier to enter and depart from the dipping inclosure and the kiln with the least admission of air and loss of vapor-laden air, and means for transferring the solvent vapors and the air containing them to a condenser, and a condenser by which said solvent vapors are converted into liquid form.

2. An apparatus for the recovering of solvents used as a vehicle for coating manufactured articles with japan, lac uer or other coating, comprising a kiln for eating the coating material and driving oflt' and confining the vaporof the solvent thereof, in combination with a carrier extending partially within said kiln and by which the articles to be coated are passed through said kiln, a tank containing the coating material so placed relatively to the carrier that the articles to be coated may be passed therethrough before entering the kiln, an inclosure for the space in which said tank re:

be placed and within which inclosure ii coated articles may be allowed todrip be fore entering the kiln, said inclosure being arranged adjacent to the kilnand connecte therewith by a passage, trapped passagesfor allowing the articles on the carrier to enter and depart from the dipping'inclosure' and the kiln with the least admission of air and loss of vapor-laden air, means for transferring the solvent vapors and the air containing them to a condenser, a condenser by which solvent vapors are converted into liqand a trap for the passage from the dipping. inclosure into the kiln through which the coated articles are passed by said carrier.

3. In an apparatus for the recovering of a solvent used as a vehicle for coating manufactured articles with japan, lacquer or other coating, which comprises a for heating the coating material and for confining the vapor of the solvent driven oif carrier extending partially within said kiln and by which articles to be coated are passed incorribination with a therethrough, a second inclosure adjacent to for said passage, a condenser by which the 10 said heating kiln and through which said carrier also passes, with means therein for applying a coating to the articles to be coated as they pass through said inclosure,

a passage connecting said second inclosure with said kiln through which the coated artlcles are conveyed by said carrier from said second inclosure to said kiln, with a trap solventapors are converted into liquid form, and means for vent vapors 1n the klln'to said condenser.

transferring; the sol- WILLIAM SAMUEL ROWLAN D.

Vitnesses ERNEST V. PELTON, C. F. BENNETT.

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