US1300250A - Process of making adhesive material. - Google Patents

Description

C. H. CROWELL.

PROCESS OF MAKING ADHESIVE MATERIAL.

APPLICATION FILED NOV. 4, 1915.

1,300,250. Patented Apr. 15,1919.

O G O ff To all whom it may concern:

CHARLES H. CROWELL, OF BROOKLYN, NEW YORK.

PROCESS OF MAKING ADHESIVE MATEBIAL- I Specification of Letters Patent.

Patented Apr. 15, 1919.

Application filed November '4, 1915. Serial No. 59,673.

Be it known that I, CHARLES H. CRowELL', a citizen of the United States, residing at Brooklyn, county of Kings, Stateof New York, have invented a certain new and useful Improvement in Processes of Making Adhesive Material, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to a method of manufacturing the novel adhesive material fully described in an application filed November 4, 1915, Serial No. 59,672.

In that application, I have described in detail an adhesive material composed of animal glue, .insp'issated vegetable juices, a solvent composed of tartaric, acetic, and citric acids and Water, and a small quantity of sodium chlorid. I Said adhesive when completed is preferably in the form of a sheet or tape without a fabric or paper backing and is dry and non-adhesive at ordinary atmospheric temperatures, but becomes fluid 2nd strongly adhesive on the application of cat.

My invention will be fully understood by reference to the following description taken in connection with the accompanying drawings, and the novel features thereof are pointed out and clearly defined in the claims at the close of this specification. M

In the drawing the figure is a side elevation of an apparatus by means of which certain steps of the herein described process are practised. It will be understood that it-is necessary to heat or cook as a partof the method of manufacture of the mixture but it has not-been thought necessary to illustrate any device for performing this step as the ordinary open jacketed steamkettle may be employed. c

In the manufacture of my adhesive in accordance with the herein described process,

I dissolve five per cent. of sodium chlorid in the acid solvent, equal portions ofanimal glue and this solvent containing the chlorid of sodium are then put together and allowed to-soak five or six hours, or even longer, forming a glue'je'lly. Two parts of the inspissated vegetable juices and one part of the acid solvent mixture such as stated arecooked syrup mixture are then'mixed in the proportion of about two parts of the glue jelly to one of the cooked syrup mixture in a jacketed kettle and heated to a temperature of about 160 to 180 Fahr. being ma1ntained at this temperature and thoroughly stirred for about two hours.

The mixture thus produced is placed in a jacketed trough or basin 11 inwhich the mixture is maintained at a proper temperature to keep it in liquid form and at the same time to drive off as little of the solvent contained therein as possible. A roll 12 is mounted to revolve in the basin, the lower part of the roll dipping in the mixture. At 13 is shown a doctor or scraper arranged on one side of the roll and adjustable by means of the screw l t to or from the periphery of the roll so as to allow the operator to control the thickness of the layer of adhesive material taken up by the roll as it revolves.

On the opposite side of the roll from the doctor, is an inclined scraper 15, the top edge.

- of which is pressed against the roll 12. This inclined scraper is at an angle of about 45 and has raised sides to keep the adhesive material from running over the edges as it runs down the incline of the scraper. Below this scraper 15, is an endless metal belt 16 which travel-s forward at a correct speed so that the adhesive material is laid in a continuous web 30 on this belt or apron. The thickness of the web is varied according to the position at which the doctor or scraper is set with relation to the surface of the roll 12. At 17 are shown cooling pipes by which the apron 16 is-maintained at a low temperature so that it instantly chills the adhesive. The metal apron 16 is of considerable length and inclosed in a box 18 through which a current of air is circulated by a fan 19, to produce a slight drying action by removing a small amount of the moisture from the sur-, face of the Web of adhesive material. A small amount of oil or some other suitable substance is applied to the surface of the traveling apron to prevent the web adhering to it. This oil is applied to the outer side of the metal apron by means of a felt covered roll 22 and any surplus is removed by a similar roll 23:

At the end of the apron farthest from the roll 12 is located a trough 20 by'which there is applied to the top surface of the strip of At 24 is shown a soft felt or bristle roll which removes from the surface of the Web of adhesive material the surplus powder and also fubs or polishes the surface imparting to it a texture something like that of rubber tissue. After passing the roll 24 the web of adhesive material passes around the guide rolls 25 and 26 and then under the second trough 27 which deposits powder 28 on the opposite side of the strip. At 29 is shown a roll similar to the roll 24 which treats the surfaceun the same way, the Web of adhesive, material being at this time supported on a of the ingredients and allowing them to soak for a period of time to form a glue jelly, cooklng a mixture of other ingredients until the said -mixture congeals quickly when dropped in cold water and mixing the said glue jelly with said cooked mixture and then heating the combined mixture, then forming a Web of said combined mixtures after they have been heated.

2. The method of making a web of adhesive which consists in mixing together some of the ingredients and allowing them to soak for a period of time to form a glue jelly, cooking a mixture of other ingredients until the said mixture congeals quickly when dropped in cold water and mixing the said glue jelly with said cooked mixture and then heating the combined mixture, then forming a 'Web of said combined mixtures after they have been heated, and then chilling the web to harden the same.

In testimony whereof I afiix my signature, in presence of two witnesses.

CHARLES H. CROWELL.

Witnesses:

GEORGE P. DIKE, ALICE H. MORRISON.

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