US1347852A - Apparatus for producing protected metal sheets having perforated fibrous layers - Google Patents

Description

J. HAMILL.

APPARATUS FOR PRODUCING PROTECTED METAL SHEETS HAVING PERFORATED FIBROUS LAYERS.

APPLICATION FILED MAY 9, 19H.

Patented July 27, 1920.

l7zveizd'0 7' W W 24 6 wow a sheet shown in saturation of the sheet with the relatively strength,-

UNITED" STATES PATENT OFFICE.

JAMES HAMILL, 0E LAMBEETVILLEQNEW JEEsEY, ASSIGNOR To AsBEsTos PROTECTED METAL COMPANY, 0E PITTSBURGH, PENNSYLVANIA, A con,-

PORATION OF PENNSYLVANIA.

APPARATUS FOR PRODUCING PROTECTED METAL SHEETS HAVING PER'FORATED FIBROUS LAYERS.

Specification of Letters Patent.

Application filed Kay 9, 1917. Serial No. 167,512.

To all whom it may concern:

Be it known that I,'JAMES HAMILL, a citizen of the United States, and a resident of Fibrous Layers, of which the following de-" scription, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to an apparatus for producing a novel product composed in whole or in part of fibrous material saturated or impregnated with a saturating material.

The apparatus is especially applicable for treating sheets, webs or layers of fibrous materials, such as asbestos felt or paper, wool felt, paper stock in sheet form, artificial leather, fiber board and the like, which under normal conditions resist penetration by a relatively thick or heavy .saturant, whereby a superior impregnation or saturation may be obtained with a thicker or heavier saturant at a relatively low temperature, at which danger of injuring the fibrous material by high heat is avoided and a stronger and better article produced.

The invention is particularly applicable among other uses for the treatment of fibrous sheets or layers, such as asbestos are to be im regnated or saturated with bituminous su stances, such as asphalt, or with other adhesive material, and to facilitate description, I will hereinafter refer to the fibrous material as asbestos paper and thesaturant as as halt.

The particular eatnres of this invention will be pointed out in the claims at the end of this specification.

Figure 1 represents in section and elevation one form of apparatus embodying the invention.

Figs. 2 and 3, details of the perforating device shown in Fig. 1.

Fig. 4:, a section of the paper sheet or layer applied to one surface of the metal Fig. 1, to illustrate the thick asphalt.

-- passes between the delivery r As stated above, the perforating devices.-

Fig. 5, a like section with the perforationsextccnded but partially through the sheet, an

Fig. 6, a section like Fig. 4 showing the surfaces covered with asphalt.

In Fig. 1, I have represented one form of apparatus embodying the invention, which apparatus is in the main substantially such as shown in U. S. Patent N0. 1,002,303, dated September 5, 1911, and is employed for-producmg asbestos protected metal sheets, and consists of a kettle 10 containing a bath of asphalt 12, maintained in a fluid condition by heat supplied by burners 13 .or otherwise, and through which bath a metal sheet 14 is passed so as to be covered with the asphalt, which serves to cement to the opposite surfaces of said metal sheet, webs, layers or sheets 15, 16, of asbestos paper, which are taken from rolls 17, 18, of the same.

The metal sheet 14 is fed through the bath by suitable feed rolls, represented ,by the gears 19, 20, and is properly directed by suitable guides 21 to delivery rolls, about which the asbestos webs15, 16, are passed, ggdgswhich are represented by the gears In order to obtaina superior saturation or impregnation of the paper webs or sheets 15, 16, with the asphalt 12, the said paper webs or sheets are provided with substantially small or fine perforations 25, which may extend entirely through the paper as represented on an enlarged scale in Figs.'4 and 6, or but partiall therethrough as'represented in Fig. 5. hese perforations may be made in the paper webs by suitable devices, herein represented as prick points or projections 26 on the circumference of rollers 27, 28, which points or projections may be made in any siutable manner, and said rollers are located between the rolls 17 18, and the delivery rollers 22, 23, and cooperate with bed rolls 30, 31, which support the paper webs 15, 16, to perforate the latter before they are brought into contact with the asphalt coated metal sheetilas the latter re s.

are made sufliciently thin or small so as to permit of the paper webs being perforated without injuring the paper or weakening its Patented July 27,1920.

When the perforated paper webs are brought into contact with the asphalt coated metal sheet 14, the paper webs are adhesively attached to the metal sheet by the asphalt ,which covers the surfaces of the metal sheet, and the asphalt on the metal sheet is more'or less absorbed by the paper webs, and a portion of the asphalt fills the perforations, which act as reservoirs or wells to feed the asphalt into the interior or body portion 'of the aper web or sheet, as represented by the ne lines 32 extended from said perforations, Fig.' 6. The perforations remain filled with the asphalt, which when cooled form as halt-keys, rivets or bonds 33 for firmly bon ing together the laminae of the paper web and also for e fiz'ec-. tively attaching the paper web to the metal sheet by a substantially large number of minute or small bonds.

As a result,the paper web is attached to the metal sheet in a superior manner and a superior protected metal article is obtained.

The webs or sheets 15, 16, may be plain or non-saturated material, or may be webs or sheets which have been previously perforated and saturated before they are used with the apparatus shown in Fig. 1".

By means of the present invention, any given felt or layer of fibrous material can be saturated with any given saturant at a much less heat than is now possible, which, besides being economical, increases the range of saturating materials with respect to those fibers which are injured by a higher heat.

So also a very much heavler saturant may be used for any given material, which results in a stiffer, stronger and better product. Furthermore the time required for saturation is shortened to a marked degree; with a coresponding increase in the commercial production.

I have herein represented one construction of device or appartus for perforating 1 the fibrous felt, paper or like material and for applying it to the metal sheet, but it is not desired to limit the invention to the parheavy saturant, a bed roll to support a paper web or sheet, a perforating roll cooperating with the bed roll to perforate the paper web or sheet While the latter is supported by said bed roll, and means for applying said perforated paper web to the coated surface of said metal sheet.

2. Apparatus of the character described, comprising means for coating the opposite surfaces of a metal sheet with a liquid adhesive, means for applying sheets of material composed in Whole or in part'of fibrous material to the opposite surfaces of said metal sheet, and perforating devices cooperating with said fibrous sheets to provide them with substantially small perforations before they are engaged with the coated metal sheet. n

3. Apparatus of the character described, comprising means for coating the opposite surfaces of a metal sheet with a liquid adhesive, means for applying sheets of material composed in whole or in part of fibrous material to the opposite surfaces of said metal sheet, perforating rolls cooperating with said fibrous sheets to provide them with substantially small perforations before they are engaged with the coated metal sheet, and bed rolls to support the said fibrous sheets while they are being perforated;

In testimony whereof I have signed my name to this specification.

I JAMES 'HAMILL.

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