US2013928A - Chill-hardening adhesive - Google Patents

Description

Patented Sept. 10, 1935 PATENT OFFICE CHlLL-HARDENING ADHESIVE Kent M. ltichardsom winona, Minn, and David J. Harding, KansasCity, Kans.,, assignors, by 1 mesne assignments, to Industrial Patents Corporation,.(lhicago, 111., a corporation of Delav No Drawing. Application July 14, 1928, Serial No. 292,910

2 claims. (01.149-2) This invention. concerns mainly the packing indust-ry and relates especially to adhesive coating materials which are substantially fluid when hot and which congeal upon chilling, particular 5 reference being had to. such materials adapted foruse as food carcass depilatories.

The main objects of the invention are to provide an improved and less expensive material or compound than those heretofore known or used for the purposes specified; to provide for thus utilizing such common and inexpensive materials as rosin and cottonseed oil; to provide such a depilatory adapted for liquefaction in mass by moderate heat and for subsequent setting when applied as a coating and chilled; to provide such a material adapted for spraying when hot and adapted for stripping off together with all epidermal 'excrescences and other extraneous matter when set as a hard coating; and to provide an effective carcass stripper thus composed adapted for ready renovation, by heat liquefaction and filtration, for reuse.

We find that the foregoing objects are acco plished by fusing together certain resinous and unguinous materials in appropriate proportions and: then applying the hot compound as a thin coating to the skin of the carcass to be treated. Then the coating is chilled and removed, carrying with it all hair and other extraneous material. The compound is then recovered by fusing and straining out the foreign matter. A preferred form of this material or compound consists, of about 90% of rosin with a complement of cottonseed oil. The rosin may vary from 88% to 93%, the-lower percentage adapting the com pound for machine removal and the higher for hand removal, the latter being somewhat the stifler. This compound can be produced in quantity for about four cents per pound. 40 Another embodiment of our depilating compound is more particularly described and claimed in our copending application, Serial No; 7430, filed February 20, 1935, entitled Depilating adhesive, which application is a division of the pres- 46 ent application.

The method of using the depilatory of the pres- I ent application and the depilatory of our co-pending divisional application Serial No. 7430 is illustrated in our prior United States Patent No.

50 1,748,082, dated February 25, 1980, entitled, Carcass treating method. The coating material is prepared by mixing and melting the resinous and .mutually complementary unguinous ingredients, or by remelting an old mixture.

Then the resultant fluid depilatory is applied in 5 any desired manner directly to the skin surface to be cleaned, as-by spraying, brushing on, or by dipping the carcass. The adherent coating is then quickly chilled in any convenient manner,

as by means of a cold water spray. 10 The hardened coating, which may be more or less brittle, together with all epidermal excrescences and extraneous matter set therein is then removed in any way which may, be found convenient. Although the coatings may .1 be 15 stripped off by hand if of appropriate or rather yielding consistency, still it is generally preferable to strike them off with a power beater or by means of a so-called polisher. For beater removal a relatively hard and brittle coating is best. 20

The harder the coating desired, the more rosin is used and the more the coating is chilled prior to beating off. I

The value of these materials and their use in the packing industry lies not only in their econo- 25' my of labor, but also in getting "on into higher grades, due to enhancing the. appearance of the meat product. We have never been able to ,detect any deleterious effect of any sort on carcasses treated with these coatings. I 30 Although but one'specific embodiment of this invention is herein described, it is to be understood that no attempt has been made to describe specifically all useful embodiments and that some of the details set forth may be altered or omitted 35 without departing from the spirit of the invention, as defined by the following claims.

a 'We claim;

1. A depilatory comprising about ninety per cent of rosin and a complement of cottonseed oil. 40 2. A fusible chill-hardening adhesive depilatory coating material of substantially uniform amorphous consistency adaptedto be sprayed when hot and adapted for stripping ordinary epidermal excrescences from edible carcasses whenappliedas a coating and chilled, comprising about ninety per cent of rosin and ten per cent of unguinous material. p

KENT M. RICHARDSON.

DAVID J. HARDING.