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Publication numberUS2622990 A
Publication typeGrant
Publication dateDec 23, 1952
Filing dateJun 10, 1948
Priority dateJun 10, 1948
Publication numberUS 2622990 A, US 2622990A, US-A-2622990, US2622990 A, US2622990A
InventorsRinck Franklin B, Williams Edwin K
Original AssigneeWestern Electric Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of manufacturing number plates
US 2622990 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Dec. 23, 1952 F. B. RINCK ETAL METHOD OF MANUFACTURING NUMBER PLATES 2 SHEETS-SHEET 1 Filed June 10, 1948 INVENTORS' F B. R/A/c/r E. A. WILL IAMS Dec. 23, 1952 F. B. RINCK ET AL METHOD OF MANUFACTURING NUMBER PLATES 2 SHEETSSHEET 2 Filed June 10, 1948 INVENTORS /-T B. R/A/c/K E. K. VV/LZ/AMS alllrial'i ATTORA FV Patented Dec. 23, 1952 UNITED STATES TENT OFFICE METHOD OF MANUFACTURING NUMBER PLATES Application June 10, 1948, Serial No. 32,104

9 Claims.

This invention relates to a, method of manufacturing indicia bearing members and more particularly to a method of making number plates for use with, dial type telephones.

t is an, object of the invention to provide a simple and effective method of making indicia bearing members.

In accordance with one embodiment of the invention, a telephone number plate with number and other indicia defining recesses formed on the rear face thereof is molded from transparent plastic material. A large portion of the area of the rear face of the plate outside of the indicia defining recesses and extending up to the edges thereof is coated. with a material of one color applied with an inking type of stamp to form a background color, after which a mask is applied to the rear face of the plate, exposing the recesses and relatively small areas of the coated rear face around the recesses, and a coating of another color is sprayed or otherwise applied to re recesses and the exposed coated surfaces surrounding them, after which the mask is removed and the entire rear face of the plate is sprayed or otherwise coated with a material of the background color.

In another embodiment of the invention, the molded transparent telephone number plate, having the indicia defining recesses formed on the rear face thereof, is coated over the entire area of the rear face outside of the recesses and extending up to the edges thereof by rolling a coating of material of one color thereon and then spraying or otherwise applying a coating of another color into the recesses and to the coated surfaces adjacent thereto.

Other features and objects of the invention will be apparent by reference to the following detailed description thereof and the accompanying drawings illustrating several embodiments of the invention in which:

Fig. 1 is a front face view of the molded number plate;

Fig. 2 is a cross sectional view through the molded number plate, indicated as taken on the line 2-2 of Fig. 1, showing the plate inverted and before any coating materials have been applied thereto;

Fig. 3 is an elevational-sectional view of a printing die or stamping member used for applying the initial background coating material to the plate;

Fig. 4 is a rear face view of the number plate showing a masking plate placed thereon with portions of the masking plate brokenaway;

Fig. 5 is an enlarged fragmentary sectional view indicated as taken on the line 5-5 of Fig. l and showing the plate before any coating materials have been applied thereto;

Fig. 6 is a view similar to Fig. 5 showing 1e number plate after the first or background coating has been applied to portions of the rear face of the plate;

Fig. 7 is a view similar to Fig. 6 showing a masking disc applied to the plate;

Fig. 8 is a view similar to Fig. 6 showing a coating of another color applied to the recesses of the plate through apertures in the masking disc;

Fig. 5-) is a view similar to Fig. 8 showing the plate with the final coating applied thereto;

Fig. 10 is a view similar to Fig. '7 showing a different form of mask applied to the plate;

Fig. 11 is a view similar to Fig. 10 showing the mask removed from the plate and the final coating applied thereto;

Fig. 12 is a diagrammatic sectional view of another embodiment of dial construction and a roller method of applying a background coating to the rear surface thereof; and

Fig. 13 is an enlarged sectional view similar to Fig. 12 showing the dial with a coating applied to the indicia defining recesses therein,

Referring to the drawings (Fig. 1), the telephone number plate l5 selected to illustrate one embodiment of the inventon is molded from suitable plastic material by any well-known method of molding to form a transparent memher. The number plate I5 has an annular dished or conical shaped front wall ll having a smooth front face and having indicia defining recesses iii formed in the rear face thereof. The recesses i9 define a series of numbers from 1 to 9 and 0 and a plurality of letters grouped around some of the number defining recesses, as shown in Figs. 1 and l. The side walls of the recesses i9 may be straight or curved and join with the rear surface of the plate to form sharp corner edges of the indicia defining recesses. A marginal cylindrical wall 2| extends from the rear surface of the plate and is provided with an out.- wardly extending flange 22. Circular reinforcing ribs 24 and 25 are also formed on opposite sides, respectively, of the plate.

In order to have the indicia easily seen through the front face of the plate, it is desirable to provide the surfaces of the indicia defining recesses and the rear surface of the plate, respectively, with contrasting appearances and this is accomplished by applying to the rear surface of the plate a background coating of one color and applying to the indicia defining recesses a coating of another color. With the construction of the dial illustrated in Figs. 1 to 9, the method consists in coating large areas of the rear face of the dial outside of and adjacent the recesses I9 to provide the background color for the areas surrounding the recesses, then applying a coating of a different color to the recesses, after which the entire rear face of the plate is covered with a coating of the background color.

The background coating may be applied to portions of the rear face of the plate I by a printing or transfer process employing a stamp or die 35. The stamp 35, which may be formed of relatively hard rubber or other suitable material, is cylindrical and has an annular conical bottom surface 31 shaped to conform to a portion of the rear surface of the plate I5. A coating of printing ink or paint or other composition, preferably of black color and quick drying, may be applied to the lower surface 31 of the stamp 35 by engaging it with a compositioncontaining stamp pad or by rolling the composition thereon, as is usual in the printing art, and then the stamp 35 may be moved into engagement with the rear surface of the plate to transfer the coating 30 onto the plate. The coating 30 does not come in contact with the walls of the recesses I9 and adheres only to portions of the rear face of the plate, as indicated in Fig. 6, and extends to the edges of the indicia defining recesses I9 and maintains a sharp outline thereof. After the background coating 30 has dried, the walls of the recesses I!) may have applied to them a coating 3| of a contrasting color, as, for example, white, as by being brushed or sprayed thereon.

The coating 3| is preferably sprayed into the recesses I9 through apertures in a mask 40 covering the rear face of the plate. The mask 46, which is made of metal or other suitable material, is shaped to conform generally to the rear face of the plate and is provided with apertures 42, which are adapted to uncover predetermined areas of the plate when the mask is applied thereto. If desired, the apertures 42 may be connected together to form a continuous aperture exposing all of the recesses and the mask may be properly aligned with the plate in any suitable way. With the mask in position on the plate, as shown in Fig. 4, the entire rear face of the plate is covered except for the indicia defining recesses I9 and adjacent areas surrounding the recesses which are accessible through the apertures 42. The coatmg of paint or other composition 3|, having a color different from that of the coating 30, is sprayed or otherwise applied to the recesses I9 and the coated surfaces of the plate accessible through the apertures 42. The mask 40 is then removed and the entire surface of the rear face of the plate is sprayed or otherwise covered with a coating 32 of the same color as the background coating 30.

Instead of following the sequence of steps as described above, the sequence may be varied as illustrated in Figs. and 11. After the first portion of the background coating is applied to the plate I5, a mask 50 (Fig. 10) may be placed on the rear face of the plate I5 to cover the recesses I9 and the adjoining portions of the coated rear face of the plate and a background coating 5| applied to the remainder of the uncovered background surface of the rear face of the plate, after which the mask 50 may be re- 4 moved and a coating 52 of another color may then be applied to the walls of the recesses I9.

By first applying the background coating 30 to the plate, indicia defining apertures are formed therein which are sharp and definite and register exactly with the indicia defining recesses ID in the plate I5. This is important, especially in small isolated or island areas as, for example, island areas within the numbers such as 8, 9 and 0, et cetera, and the letters a, b, (1, et cetera. Thus, by applying the background coating first in the manner described, a definite and sharp outline of the indicia is obtained so that when the contrasting coating 31 is applied to the walls of the indicia recesses, the outline of the indicia as viewed from the front of the plate will be regular and. sharp and conform exactly in outline to the recesses I9.

In number plates where there are no obstructing marginal walls, the background coating may be applied by rolling it on with a roller, as indicated diagrammatically in Fig. 12. In this embodiment, a plate, indicated diagrammatically at H5, is provided with indicia defining recesses I I9 extending inwardly from the rear face thereof. The background coating I30 of one color may be applied to the rear face of the plate H5 by the roller applicator I35 or by a stamp pad, as previously described. The roller I35 may have a layer of coating compound applied thereto in the usual andwell-known manner, as, for example, by rolling it over a fiat surface containing the coating compound or placing it in engagement with compound distributing rolls, after which the roller I35 is rolled across the rear surface of the plate H5 to transfer the compound from the roller onto the plate and form a background coating I30 of colored material thereon. When the coating I30 has dried, a coating of material I3I of a contrasting color is sprayed or otherwise applied to the walls of the indicia definin recesses I I9 and portions of the coated rear face of the plate adjacent the recesses H9.

From the foregoing, it will be seen that a transparent number plate having the indicia of one color set off from a background of a contrasting color may be readily formed from a transparent molded member or plate having indicia defining recesses on the rear face thereof by applying with a roller or stamp a background coating of material to all of the area of the rear face of the plate outside of the indicia defining recesses and extending up to the edges thereof and then spraying or otherwise applying a coating of different colored material to the walls of the indicia defining recesses. If the rear face of the plate is of such a nature that the entire rear surface except for the indicia defining recesses cannot be covered in one operation, areas of the rear face of the plate adjacent to and surrounding the indicia defining recesses may have the background coating applied thereto followed by either the application of the contrasting coating material to the recesses and adjacent coated portions of the rear face of the plate and then the application of the background coating to the remainder of the rear face of the plate, or the application of the background coating to the remainder of the rear face of the plate outside of the recesses and then the application of the contrasting colored coating to the walls of the recesses.

It is to be understood that the above-described arrangements are simply illustrative of the application of the principles of the invention. Nu-

merous l. o'ther arrangements may 1 be J readily devised by those-skilled .in the .-;art whichelwill embody the. principles :of the invention .andtfall within the spirit and scope thereof.

What is claimed :is:

'1. Ina .method of .making an indicia bearing article froma transparent.plastic:member having a relatively small indicia. defining recess formed in the rearfacmthereof the steps of applying a coating of. a. composition of .onecolor onto the relatively. hard surface of .saitransfer member, moving .the transfer member. into contact with the raised portions of the rear face of said article landoverthe. recess to engage the coating. of .saidcomposition thereon withzthe raised. portions only of therear :faceof. the articlesurrounding the recess and removingssaid transfer member from said article to cause a portion of thecoatingof said composition to adhere. to and. coatthe raised: portions only of the rear face .of the -article surrounding :.the recesses and extending to "the edges thereof solely by contact.yvithsaidmaised portions .to clearlydefinei the recess,.drying the coating'on the .article,..and applying acoatingof a composition of another color to the walls of said recess and portions of the coated surfaces adjacent thereto.

.2. A.method of making a. numberv plate'from a transparent plastic member. having relatively small indicia .defini-ngrecesses formed in the rear face thereof which comprises applying a coatingof. a composition of one color onto the relatively hard surface of a transfer roller, rolling the coating of said composition on the roller into engagement'with the raised portions of the rear face of the number plate and over the recesses to cause a portion of said composition applied to the roller to adhere to and coat only the raised portions of the rear face of said number plate to the edges of the recesses to clearly define said recessesdryingthe coating on the number plate, and applying a coating of a composition of another color onto the walls of said recesses and portions of thecoated surfaces adjacent said recesses.

3. A method of making a number plat from a transparent plastic member having relatively small indicia defining recesses formed in the rear face thereof which comprises applying a coating of printing composition of one color onto the relatively hard surface of a transfer member, moving the transfer member into contact with the raised portions of the rear face of the number plate to engage the coating of printing composition thereon with the raised portions only of the rear face of the number plate and then removing the transfer member to cause a portion of the coating of printing composition applied thereto to adhere to and form a coating on only the raised portions of the rear face of said number plate and extending to the edges of the recesses to clearly define said recesses, drying said coating of printing composition on said number plate, and applying a coating composition of another color onto the walls of said recesses and portions of the coated surfaces adjacent said recesses.

4:. A method of making an indicia bearing article from a transparent plastic plate having relatively small indicia forming recesses formed in the rear face thereof which comprises applying a coating of a composition of one color onto the relatively hard surface of a transfer member, moving the transfer member into en- .gagement rwith portions... of. the raised surface ofLthemre'ar.face .1of thearticle and over the recesses-to engage .the coating composition tl1ere- .on withportions of only the raised surface of therear face of the article surrounding the recesses and extending .to the edges thereof, removing saidtransfermember from said article to causela portion of the coating composition toadhere to. and coat only said portions of the raised surfaceof the vrearface of the article surrounding the'recesses and extending to the edges thereof toclearly define said recesses, drying the coatingcomposition of said one color on said article, masking substantially all of the rear faceof the article except the recesses and portions of .the coated raised surface adjacent thereto, applying .a coating composition of another color to .the recesses and the unmasked portions of thescoated surface adjacent thereto, unmasking thearticledrying the coating compositionhapplied to .the article, and applying a coatingcomposition of said one color to the uncoated portion of the rear .face of the article and to portions of the coated surfaces thereof.

7 5. A methodof making a number plate from a transparent plastic member having relatively small indicia defining recesses formed in the rear face thereof which-comprises applying a coating of printing composition of one color to the relatively hard surface of a transfer member, moving the'transfer member into contact with portions of the raised surface of the rear face of the plate to engage the coating of the printing composition thereon with portions of the raised surface of the rearface ofthe number plate With portions of the coating on the transfer member surrounding and extending across the recesses, removing the transfer member to cause a portion of the coating of printing composition applied thereto to adhere to and coat only said portions of the raised surfaces of the rear face of said number plate with the coating surrounding the recesses and extending to the edges thereof to clearly define said recesses, drying said coating of 'printing composition on said number plate,

a transparent plastic member having relatively small indicia defining recesses formed in the rear face thereof which comprises applying a coating composition of one color onto the relatively hard surface of a transfer member, moving the transfer member into contact with portions of the raised surface of the rear face of said article to engage the coating composition thereon with the portions of the raised surface of the rear face of the article surrounding the recesses and extending to the edges thereof and removing said transfer member from said article to cause a portion of the coating composition to adhere to and coat only said portions of the raised surface of the rear face of the article surrounding the recesses and extending to the edges thereof to clearly define said recesses, drying said coating on said plate, masking said recesses and portions of the coated surfaces adjacent thereto, applying a coating acaaeoo composition of said one color to the unmasked portion of the rear face of the plate, unmasking the plate, drying the latter coating composition, and applying a coating composition of another color to the walls of said recesses and the coated surfaces adjacent thereto.

7. A method of making an indicia bearing article from a transparent plastic member hav-- ing relatively small indicia defining recesses formed in the rear face thereof which comprises applying a coating composition of one color to the relatively hard surface of a transfer member, moving the transfer member into contact with the rear face of the article to engage the coating thereon with portions of the raised surface of the rear face of the article and with portions of th coating on the transfer member surrounding and extending across the recesses, removing the transfer member to cause a portion of the coat ing composition applied thereto to adhere to and coat only said portions of the raised surface of the rear face of the article surrounding the recesses and extending to the edges thereof to clearly define the recesses, drying the coating on said article, masking the recesses and portions of the coated surfaces adjacent thereto, spraying a coating of said composition of one color onto the unmasked portion of the raised surface of the rear face of said article, unmasking the article, drying said latter coating, and spraying a coating composition of another color to the surfaces of said recesses and the coated surfaces adjacent thereto.

8. A method of making a number plate from a transparent plastic member having indicia, defining recesses formed in the rear face thereof which comprises applying a coating composition of one color onto the relatively hard surface of a transfer roller, rolling the transfer roller onto predetermined areas of the raised surface of the rear face of the plate surrounding said recesses and extending to the edges thereof to cause a portion of the coating composition applied to the roller to adhere to and coat said predetermined areas of the raised surface on the rear face of the number plate with the coating surrounding th recesses and extending to the edges thereof for clearly defining the recesses, drying the coating composition on said number plate, masking substantially all of the plate except the recesses and portions of the coated surfaces adjacent thereto, applying a coating composition of another color to the surfaces of the recesses and portions of the coated surfaces adjacent thereto, unmasking the plate, drying the coating composition applied to the recesses, and applying a coating composition of said one color to the uncoated portions of the rear face of the plate and to portions of the coated surfaces thereof.

9. A method of making a number plate from a transparent plastic member having relatively small indicia defining recesses formed in the rear face thereof which comprises applying a coating composition of one color onto the relatively hard surface of a transfer roller, rolling the transfer roller over predetermined areas of the raised portions of the rear face of the number plate surrounding the recesses and over the recesses to cause a portion of the coating composition applied to the roller to adhere to and coat only said predetermined areas of the raised portions of the rear face of said number plate with the coating surrounding the recesses and extending to the edges thereof for clearly defining said recesses, drying the coating on said number plate, masking the recesses and portions of the coated areas of the rear face of the number plate adjacent the recesses, applying a coating composition of said one color to the unmasked portion of the rear face of the number plate, unmasking the article, drying the latter coating of said one color on said plate, and applying a coating composition of another color to the surfaces of said recesses and the coated surfaces adjacent thereto.

FRANKLIN B. RINCK. EDWIN K. WILLIAMS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,605,570 Smith Nov. 2, 1926 1,800,146 Leary Apr. 7, 1931 1,904,289 Neidich et al. Apr. 18, 1933 2,240,900 Bauer May 6, 1941 2,294,865 Frankenthal et a1. Sept. 1, 1942 2,376,305 Bauer May 15, 1945 OTHER REFERENCES Electrical Insulating Materials, Mica Insulator Co., Schenectady, N, Y., 1944, page 49.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1605570 *May 15, 1926Nov 2, 1926Smith John CSign lettering and process of making the same
US1800146 *Jun 27, 1930Apr 7, 1931Leary Jr Harry BurtonProcess of marking fibrous material
US1904289 *Mar 13, 1929Apr 18, 1933Neidich Samuel AMethod of manufacturing articles from celluloid and the like
US2240900 *Oct 28, 1940May 6, 1941Cardinal CorpProcess of decorating plastics
US2294865 *Feb 28, 1939Sep 1, 1942Swedisch Artid AbMethod of making decorated articles
US2376305 *Apr 3, 1939May 15, 1945Hoosier Cardinal CorpMolded article
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2863384 *Jan 15, 1954Dec 9, 1958Rich Edward LPaint spraying masks and method of making same
US4269874 *Aug 8, 1979May 26, 1981Diffracto Ltd.Method and apparatus for marking parts
Classifications
U.S. Classification427/258, 427/282, 264/245, 427/428.1
International ClassificationB29C45/16
Cooperative ClassificationB29C45/16
European ClassificationB29C45/16