US1262977A

US1262977A - Process of drying varnished surfaces.

Info

Publication number: US1262977A
Application number: US63234611A
Authority: US
Inventors: George W Priest
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-06-10
Filing date: 1911-06-10
Publication date: 1918-04-16
Anticipated expiration: 1935-04-16

Description

APPLICATION FILED JUNE 10. 1911.

Patented Apr. 16,1918.

KMQZONO Witness es combination of apparatus therefor.

GEORGE w.- PRIEST, or NEWTON, MASSACHUSETTS.

To all whom it may concern:

Be it known that I, GEORGE W. PRIEST, a citizen of the United States, residing at Newton, in the county of Middlesex and State of Massachusetts, have invented an Improvement in Processes of Drying Varnished Surfaces, of which the following is a specification.

My invention relates to certain improvements in the process of and apparatus-for manufacturing so-called patent leather. Heretofore it has been customary in manufacturing patent leather to coat the leather with a varnish made generally of linseed oil and some Chinese glue boiled to the desired consistency. After the varnish has been applied the leather is placed in a drying room or oven, so called, and left from ten to eighteen hours at a temperature varying from 140 to 170 Fahrenheit. It is then removed from the oven. The varnish at this stage is tacky to the touch and must be ex posed to a drying operation in the sunlight. Such drying operation requires the action of the direct rays of the sun and cannot be car.- ried on in dull weather or at night. It usually requires an exposure of from eight to ten hours. It is found .in practice that the so-called drying process is better accomplished in cold, clear weather than in hot summer Weather. The humidity of the air interferes with the quickness of the process. From this it would appear that the ultraviolet rays play a very important part in the operation.

Having these facts in mind, I have made use of artificial sources of ultra-violet rays and particularly the so-called quartz lamp which usually consists of a quartz container.

within which are electrodes separated by a vapor path through which the electric current is passed. Such lamps are very efiicient producers of ultra-violet rays, and thus are peculiarly adapted to the purposes of my invention. It is highly essential that the container shall be of quartz as the rays desired for my pur oses would be cut ofi by an intervening g ass.

My invention, therefore, ma be said to consist essentially, in the use 0 an artificial source of ultra-violet rays for afiecting the varnished surface of'the leather, and in the practice I have found that an exposure of PROCESS DRYING- VARNISHED SURFACES.

Specification of Letterslate'nt. Patented Apr, 16, 1918,, Application filed June 10, 1911; Serial No. 632,346. I

the varnished surfaces to the "artificial ultraviolet rays produced by quartz lamps, accomplishes in two to six hours fully as great a result in the obtained by a full day in the usual manner, that is to say, by exposure to the sunlight. Moreover, by my invention, it is possible to manufacture patent leather at all times of day regardless of the weather.

In some instances it may be desirable to use an atmosphere of ozone coincident with the treatment by the ultraviolet rays as drying process as is the ozone appears to have some oxidizing effect. Usually, however, the use of ultra violet rays alone is suflicient and produces the best results.

In the accompanying drawings, I have pose of better insuring that all portions of the varnished surfaces shall receive anequal amount of treatment. At the same time that the treatment is proceedin a current of air maybe driven through t e oven or room containin the revolving cage, as indicated by the b ower, 40, having an outlet pipe, 42, leading to the cage, and supplied by a pipe,4c4, leading from tank, 43. Heat: the process either may be applied durln the skins by heating the air de ivered through the pipe, 42, or by heating coils, 30, arranged wlthin the drying room.

In some instances if it is desired to expose the skins to the action of ozone at the same time, then an ozonizer, 12, may be employed and so arrangd thatits products will be liberated within the drying room.

It will be apparent that various different ways may be adopted for exposing the skins to the action ofgthe artificially produced ultra-violet rays, and that above described is only typical.

I claim as my invention:

1. The method of finishing patent leather required chemical changes within -which consists in directing artificial light nch in ultra-violet rays against the varent leather, t emethod of oxidizing the varnished surface which consists in exposthe same to the action of a heated ingand to light rich in ultra-violet atmosphere rays.

3. The process of drying, ing patent-leather varnish in exposing the varnished surface to the di rect action of ultra violet rays of light in a drying room and charging the atmosphere of the drying room with ozone in excess of setting and fixwhichconsists that which is incidentally generated by the presence of the ultra violet rays of light.

4. The process of drying, ing patent-leather varnis' h whi'ch' consists in subjecting it in 'a losed unventilated chamber to the action of ultra violet rays of light in the presence of ozone in excess of that which is incidental to thepresence 25 of the ultra violet rays of light.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

GEORGE w. PRIEST;

Witnesses: B. J. NoYEs, H. B. DAvIs.

setting and fix- 20