US1130304A - Process of making and waterproofing paper tubes. - Google Patents

Description

G. F. LINDSAY & 1'. MALONEY. PROCESS OF MAKING AND WATERPROOFING PAPER TUBES.

APPLICATION FILED MAY 28, 191 4.

1,130,304, Patented Mar. 2, 191 5.

NVEIVTORS A ram/5r areas an FTQ CHARLES E. LINDSAY, OF FAIRFIELD, AND FRANK H. MAIiONEY, OF BRIDGEPORT CONNECTICUT, ASSIGNORS T0 UNION METALLIC CARTRIDGE COMPANY, OF BRIDGE- PORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

menace.

Specification of Letters Iatent.

Patented Mar. 2, 1915.

Application filed May 28. 1914. Serial No. 841,530.

To all whom it may concern:

Be it known that we, (1) CHARLES F. LINDSAY, a subject of the King of Great Britain, and (2) FRANK H. MALONEY, a citizen of the 'United States, residing at (1) Fairfield and (2) Bridgeport, county of Fairfield, State of Connecticut, have invented an Improvement in Processes of Making and Waterproofing Paper Tubes, of which the following is a specification.

In the accompanying drawing forming a part of this specification, the figure is a perspective showing a tube partly wound and therefrom, the paper intended for such purposes is usually made uncalendered or nearly so, and in order to produce tubes which will hold to their dimensions under variable climatic (trade) conditions, it is necessary to waterproof the same. This is usually done by impregnating the tubes with a water resisting compound, such as paraffin wax, or a like substance. The objection to this method of waterproofing is that, in order to effect a satisfactory waterproofing, it is necessary to impregnate the ,tubes with a large percentage of their weight of waterproofing material. This, among other disadvantages, renders the tubes more or less translucent which, on account of the varying absorptiveness of the tubes, tends to cause an uneven appearance, especially when the tubes are colored, and gives to the tubes a mottled or blotchy character. To prevent this and to insure the production of a fin-' ished article, the surface of which will present an even color, and at the same time, give a superior waterproof quality to the tubes, we treat, by impregnating or coating the tubes, either at the time of pasting or thereafter, with a water emulsion of a polymerizable vegetable oil partially saponified with ammonia,'or with a water emulsion of a polymerizable vegetable oil mixed with wax, the oil being partially saponified with ammonia. Such emulsion can be mixed with starch or other paste, or may be applied to the pasted tubes by spraying or other means.

We recognize that tubes have been coated previously by spraying and other convenient means, and do not claim, any way, such operation as part of our improvement.

The method preferably used is to first paste the tubes in the usual manner on a machine suitably designed for the purpose, and then treat the wet tubes with an emulsion made of; 2 parts each of Japan wax and Chinese wood oil, (tung oil), 1 part of ammonium hydrate solution, with'specific gravity of 0.9, 40 parts of water. The tubes are then dried by heating, which also drives oif the ammonia from the tubes and gelatinizes the polymerizable oil contained therein. The tubes may then be sized and polished readily without the use of other lubricant, and may, or may not, thereafter be treated in the usual waterproofing bath of parafin. It should be understood that the term sizing as herein used refers to thepassage of the tubes through dies, or by other means bringing the tubes to exact size. If preferred, the drying of the tubes may be carried out at ordinary temperatures, andthe evaporation of the ammonia and the gelatinization of the oil performed by the heat generated in the sizing dies, or by other convenient means.

Tubes waterproofed as above described will be equal to or superior in waterproof qualities to tubes thoroughly impregnated with parafiin wax and frequently containing.

thirty per cent. or more of waterproofing material, while tubes waterproofed by our process contain only a small percentage, approximately two per cent. of their weight of gelatinized oil.

Having thus described our invention, we

tubes which consists in treating, by impregnation or coating, the paper tubes with Chinese wood oil partially saponified by ammonia and emulsified in water, and thereafter heating the tubes in order to evaporate the ammonia and gelatinize the oil.

3. The process of waterproofing paper tubes which consists in treating the pasted but unsizecl paper tubes with a partially am monia saponified water emulsion of Japan wax and Chinese wood oil, drying the same, and thereafter passing the tubes through suitableheated dies, whereby the tubes are sized, polished and waterproofed in one operation.

nieoeoa 4. The process of waterproofing paper tubes which consists in treating the tubes with a partially ammonia saponified water emulsion of Chinese wood oil and wax and thereafter heating the tubes whereby the ammonia is driven ofi and the oil gelatinizeol therein.

In testimony whereof we afiix our signatures in presence of two witnesses.

- onnnnns r. LINDSAY; FRANK H. MALUNJEY.

Witnesses LENA M. Jonnson, MARY S. 'BURRoneHs,

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