US1899688A - Process for the production of impregnated paper and the like - Google Patents
Process for the production of impregnated paper and the like Download PDFInfo
- Publication number
- US1899688A US1899688A US52675731A US1899688A US 1899688 A US1899688 A US 1899688A US 52675731 A US52675731 A US 52675731A US 1899688 A US1899688 A US 1899688A
- Authority
- US
- United States
- Prior art keywords
- paper
- roll
- production
- projections
- impregnated paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/48—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials
- H01B3/485—Other fibrous materials fabric
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/66—Treating discontinuous paper, e.g. sheets, blanks, rolls
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24628—Nonplanar uniform thickness material
- Y10T428/24669—Aligned or parallel nonplanarities
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31971—Of carbohydrate
- Y10T428/31993—Of paper
Definitions
- the invention deals with the impregnation of paper or other material in the form of long pieces with liquid or semi-liquid material. Processes at present in use for this purpose are oftwo types. In one the material, which is in the form of a roll, is unrolled and drawn through a tank of the impregnating liquid and therefore materials which are more suitable for many purposes cannot be employed with certainty of obtaining complete and uniform impregnation. In the second case it is difficult to obtain uniform impregnation of difierent parts of the roll as the impregnating 'material will not readily penetrate to the interior.
- the present invention provides an improve ment on the second method of procedure which facilitates the impregnation of the material without seriously adversely affecting its structure and tensile strengh and permits of the use of larger rolls than could otherwise be considered practicable.
- the material in the roll un dergoes an embossing process of sucha nature;
- a roll thus prepared is placed in the impregnating chamber and subjected to an appropriate treatment 7 which may include the use of heat, vacuum or pressure or a combination of any two or more of these.
- Figure 3 is a perspective View of a roll of paper embossed as shown in Figures 1 and 2, the roll itself being shown on a reduced scale whilst, for the sake of clearness, the projections and the spacing thereof are shown on a scale approximately four times as great as that employed for the roll.
- This embossed paper is produced by pressing small rounded tools into one of the surfaces of plain paper so as to produce on the side B more or less conical depressions 1 and at corresponding places on the side A more or less conical projections 2.
- These projections 2 are distributed more or less uniformly at short intervals all over the surface of the paper;
- Figure l shows the appearance of the indented side of such embossed paper and, with Figure 2, gives an idea of the size of the projections and spacingthereof preferred for paper the ,thickness of which is about 5 to 6 mils.
- the desired spacing between adjacent convolutions in a roll of paper which it is desired .toimpregnate may be produced other than by embossing the paperin the precise manner illustrated inthe drawing.
- Variously shaped projections may be produced on one or both sides of the paper and the size and spacing of the projections may be varied to suit different conditions.
- the paper After having been subjected to the emboss- -ing process the paper is rewound, preferably to form fiat rolls, such as that illustrated in Figure 3, in. which the adjacent convolutions of each roll are spaced apart by the projections 2 thus permitting the passage of impregnating material between convolutions of paper and so enabling the whole ofthe paper in the roll to be substantially more evenly and thoroughly impregnated than would be the case were no spacing between adjacent convolutions provided.
- An improved process for the impregnation with liquid or semi-liquid material of paper or other material in the form of long pieces comprises providing the material with series of substantially uniformly spaced and approximately conical projections by an embossing process which leaves the greater part of the material lying in the original plane thereof and substantially unaffected, rolling up the material in such a way that the projections form spacers to keep the layers of the roll apart, thus producing a roll of sufficiently open form, and finally impregnating the rol In testimony whereof I aflix my signature.
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Paper (AREA)
Description
Feb. 28, 1933. HlLL 1,899,688
PROCESS FOR THE PRODUCTION OF IMPREGNATED PAPER AND THE LIKE Filed March 51, 1931 ATTORNEYS Y Patented Feb. 28, 1933 UNITED STATES PATENT" OFFICE HARRY HILL, 0]? BELVEDERE, ENGLAND, ASSIGNOR TO CALLENDERS CABLE AND CON- STRUCTION COMPANY LIMITED, 0]? LONDON, ENGLAND, A BRITISH COMPANY PROCESS FOR THE PRODUCTION OF IMPREGNATED PAPER AND THE LIKE Application filed March 31, 1931, Serial No. 526,757, and in Great Britain April 10, 1930. V
The invention deals with the impregnation of paper or other material in the form of long pieces with liquid or semi-liquid material. Processes at present in use for this purpose are oftwo types. In one the material, which is in the form of a roll, is unrolled and drawn through a tank of the impregnating liquid and therefore materials which are more suitable for many purposes cannot be employed with certainty of obtaining complete and uniform impregnation. In the second case it is difficult to obtain uniform impregnation of difierent parts of the roll as the impregnating 'material will not readily penetrate to the interior.
The present invention provides an improve ment on the second method of procedure which facilitates the impregnation of the material without seriously adversely affecting its structure and tensile strengh and permits of the use of larger rolls than could otherwise be considered practicable. In accordance with the invention, the material in the roll un dergoes an embossing process of sucha nature;
that it produces a number of comparatively small and preferably isolated raised areas but leaves the greater part of the material lying in the original plane thereof and substantially unaffected, after which it is rolled in flat spiral in such a way that the raised parts form spacers to keep the layers of the roll apart, thus producing a roll ofsufiiciently open form to permit the impregnating material to flow in readily from the ends. A roll thus prepared is placed in the impregnating chamber and subjected to an appropriate treatment 7 which may include the use of heat, vacuum or pressure or a combination of any two or more of these.
An example of paper sultably embossed the piece of embossed paper taken on the line XX in Figure 1 buton a scale which is twice that to which Figure 1 is drawn.
Figure 3 is a perspective View of a roll of paper embossed as shown in Figures 1 and 2, the roll itself being shown on a reduced scale whilst, for the sake of clearness, the projections and the spacing thereof are shown on a scale approximately four times as great as that employed for the roll.
This embossed paper is produced by pressing small rounded tools into one of the surfaces of plain paper so as to produce on the side B more or less conical depressions 1 and at corresponding places on the side A more or less conical projections 2. These projections 2 are distributed more or less uniformly at short intervals all over the surface of the paper; Figure l shows the appearance of the indented side of such embossed paper and, with Figure 2, gives an idea of the size of the projections and spacingthereof preferred for paper the ,thickness of which is about 5 to 6 mils. It should be understood that the desired spacing between adjacent convolutions in a roll of paper which it is desired .toimpregnate, may be produced other than by embossing the paperin the precise manner illustrated inthe drawing. Variously shaped projections may be produced on one or both sides of the paper and the size and spacing of the projections may be varied to suit different conditions.
After having been subjected to the emboss- -ing process the paper is rewound, preferably to form fiat rolls, such as that illustrated in Figure 3, in. which the adjacent convolutions of each roll are spaced apart by the projections 2 thus permitting the passage of impregnating material between convolutions of paper and so enabling the whole ofthe paper in the roll to be substantially more evenly and thoroughly impregnated than would be the case were no spacing between adjacent convolutions provided.
Owing to the facility of impregnation which is obtained by the im roved process, it 5 is possible to employ desirable impregnating media which are inapplicable under other conditions owin to their high viscosity or other characteristics which hinder them from penetrating to the interior of the material. For example, by means of this improved process, it is possible to produce a paper which may be thoroughly impregnated whilst in roll form with undiluted tar. and which may be used to protect lead sheaths and armouring of cables ,from corrosive influences. Furthermore, paper so impregnated has a quantity of undiluted tar on its surface which, in addition to providing a medium. for immediate adhesion to the armouring compounds applied at the armouring machine, acts as a lubricant and ensures that as the paper is applied to. the cable it readily pulls down and assumes a very close fit and generally assures a good and improved adhesive covering without voids.
Although the examples given above have dealt with the impregnation of paper strip, the process is equally applicable to other but analogous materials such as cambric.
What I claim as my invention and desire to secure by Letters Patent is 1. An improved process for the impregnation with liquid or semi-liquid material of paper or other material in the form of long pieces, which process comprises embossing the material at a plurality of comparatively small areas but leaving the greater part of the material lying in the original plane thereof and substantially unaffected, rolling it up in such a way that the raised parts form spacers to keep the layers of the roll apart, thus producing a roll dfl sufliciently open form, and finally impregnating the roll.
2. An improved process for the impregnation with liquid or semi-liquid material of paper or other material in the form of long pieces, which process comprises providing the material with series of substantially uniformly spaced and approximately conical projections by an embossing process which leaves the greater part of the material lying in the original plane thereof and substantially unaffected, rolling up the material in such a way that the projections form spacers to keep the layers of the roll apart, thus producing a roll of sufficiently open form, and finally impregnating the rol In testimony whereof I aflix my signature.
HARRY HILL.-
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1139030A GB352533A (en) | 1930-04-10 | 1930-04-10 | An improved process for the production of impregnated paper and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
US1899688A true US1899688A (en) | 1933-02-28 |
Family
ID=9985338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US52675731 Expired - Lifetime US1899688A (en) | 1930-04-10 | 1931-03-31 | Process for the production of impregnated paper and the like |
Country Status (2)
Country | Link |
---|---|
US (1) | US1899688A (en) |
GB (1) | GB352533A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2610007A (en) * | 1950-05-15 | 1952-09-09 | Martin James | Adjustable parachute pack container and back rest |
US3143434A (en) * | 1955-06-27 | 1964-08-04 | Scholl Mfg Co Inc | Method and apparatus for producing perforated adhesive material |
US5670188A (en) * | 1994-12-19 | 1997-09-23 | Eastman Kodak Company | Apparatus for single-sided, cold mechanical knurling |
-
1930
- 1930-04-10 GB GB1139030A patent/GB352533A/en not_active Expired
-
1931
- 1931-03-31 US US52675731 patent/US1899688A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2610007A (en) * | 1950-05-15 | 1952-09-09 | Martin James | Adjustable parachute pack container and back rest |
US3143434A (en) * | 1955-06-27 | 1964-08-04 | Scholl Mfg Co Inc | Method and apparatus for producing perforated adhesive material |
US5670188A (en) * | 1994-12-19 | 1997-09-23 | Eastman Kodak Company | Apparatus for single-sided, cold mechanical knurling |
Also Published As
Publication number | Publication date |
---|---|
GB352533A (en) | 1931-07-10 |
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