US2454032A

US2454032A - Photographic border device

Info

Publication number: US2454032A
Application number: US782787A
Authority: US
Inventors: Jr William A Boulais
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-10-29
Filing date: 1947-10-29
Publication date: 1948-11-16
Anticipated expiration: 1965-11-16

Description

Nov. 16, 1948.

Filed Oct. 29, 1947 W. A. BOULAIS, JR

PHOTOGRAPHIC BORDER DEVICE 3 Sheets-Sheet l 9 INVENToR.

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Nov. 16, 1948. w. A. BoULAls. JR

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Patented Nov. 16, 1948 UNITED STATES PATENT OFFICE PHOTOGRAPHIC BORDER DEVICE William A. Boulais, Jr., Jersey City, N. J. Application October 29, 1947, Serial No. 782,787

3 Claims.

My invention relates to the use of tripack sensitized color photographic emulsion. More speciilcally it relates to those of the reversal type.

It is well known in the ait that under the normal or usual operations a black border will be secured upon printing. It is also well known that developing of such color pictures not only requires Ithe utmost care but also 4consumes a great deal of time. Due to these facts operators nd it desirable to make as many exposures as one can develop at one time.

Inasmuch as all color printing material of the reversal 4type is just the opposite of negative photographic material, if one desires Ito produce white it becomes necessary to utilize light to break down the layers of emulsion to attain that result.

My invention has for its principal object to provide a mask which when used will produce a white border or a silhouette of white upon the finished contact print or enlargement.

It can be used in `association or combination with any type of enlarging easel or any other type of holder designed to hold sensitized material where one wishes to produce a reversal border, a silhouette, or any special design either before or after the projection of the positive or negative image upon the sensitized material.

A further object of my invention is to provide a combined mask and holder.

A further object is to construct the mask with the opaque portion formed integral therewith.

A further object is to provide an easel or holder having a plurality of compartments one of which is adapted to receive the sensitized material which is to be used and another in which the material which has been exposed and is awaiting development.

A further object is to construct a target adapted to llt in the easel or holder preferably approximating the sizeof the material which is being used for printing upon. The target has a white or light area which coincides with that of the design oi' the mask which is to be used. That portion of the target outside of the design is black. This target enables the operator to compose his picture within boundaries of the area covered by the mask.

My means of accomplishing the foregoing object may be more readily understood by reference to the accompanying drawings which 'are hereunto annexed and form a part oi this speciiication in which: y l

Fig. 1 is a top or plan view oi my improved mask on the easel or holder;

Fig. 2 is a partial cross-section taken on the line 2 2 in Fig. 1;

Fig. 3 is an enlarged fragmentary sectional detail view of the construction;

Fig. 4 is a sectional view of a modied form oi' construction;

Fig. 5 is an enlarged fragmentary sectional view of the construction in Fig. 4;

Fig. 6 is an end view oi my improved easel or holder:

Fig. 7 is a top or pian view of the same the mask being omitted;

Fig. 8 is a sectional view on 4the line 8 8 in Fig. 7, the mask being shown in place;

Fig. 9 is a top or plan view of a mask showing the design of the target;

Fig. 10 is a top or pian view of my target for that design, and

Fig. 11 is a crossfsection taken on the line II-I I in Fig. 10.

Similar reference numerals refer to similar parts throughout the entire specification.

As shown in Figure 1, the mask is formed of a piece of clear glass 2 or a suitable transparent plastic may be used. This glass 2 acts as a centering device for an opaque portion 3 which may be suitably but detachably secured to the clear .portion in any suitable or convenient manner. By making vthe opaque portion detachable I am able to permit the operator to change to any design or configuration desired. The opaque portion 3 shields that part of the sensitized material, shown in dotted lines, which is under it, from the light while vthe light is breaking down that portion of such sensitized material which is not shielded, thus enabling the operator to obtain or secure a white border in the rfinal print. A handle 4 is secured to the mask, and as shown it is fastened by two screws 5 and 6, though any desired method of fastening maybe employed.

The opaque portion 3 has a ridge 'i which extends completely around the opaque portion 3 thus forming a recess 8. This recess 8 being spaced from the sensitized material 9 acts to protect it while the border, indicated by A, is being formed by the light breaking down the sensitized material exposed to the light through the transparent glass 2, to form the white border A.

In order to prevent any shadow or the production of a fuzzy edge of the border A, I have found in practice it is desirable to chamfer the outer edge I0 as clearly seen in the detail and sectional views.

In Figures 4 and 5, I have shown a modified form of mask. In this construction the opaque then placed in position on the holder.

portion is not interchangeable. The mask I2 being moulded or formed of glass or plastic with the opaque portion iii formed integral with the glass or plastic l2. This ls routed out as at i4 to protect the sensitized material 8. This forms a ridge I5. 'I'he ridge i5 in this construction is shown with practically a knife edge although the other form may be used. Lack oi shadow is secured by curving the surface as clearly seen.4

I have found in practice that the ridge, thus provided, serves to hold the sensitized material t firmly in place.

Figures 6 to 9 show my improved easel or holder. It comprises a surface iii on which is placed the sensitized material il. The surface il@ has flanges Il and i8, which serve to hold the sides of the sensitized material 9 down. flange i9.

These flanges are provided with upwardly extending portions which act as guides to correctly position the glass portion of the mask. Below the surface it, I form two compartments 2d and 2i, admission to which is gained by means of a door 22 which swings on spring hinges 23. It is rendered light tight by ridges 24 which enters corresponding grooves. The compartment is for the reception of unexposed material. The compart ment 2| is for material which has been exposed and is awaiting development. The edge of the bottom o compartment l@ has a nger hole, which affords easy access for the removal of un exposed sensitized material.

I have found in practice it is desirable to provide the holder with feet Zd made of rubber which holds the easel or holder in position upon the enlarger base board indicated in Figure d by dotted lines. A nger slot is provided to afford the operator a start in removing the sensitized material 9 from the surface iii of the holder.

It will be clear from the foregoing that the light tight door 22 is not liable to be accidently opened while it contains the sensitized exposed and ums exposed material when the target of the sensitlzed material is in the holder, for the material or the target will overlap the upper edge of the.. light tight door 22 and the thumb nail groove 2li which is provided ier convenient opening of the door 22.

In Figures 9 to il I have shown the use ci my target. In Figure 9 the mask is provided withI an opaque portion in the shape oi a hey-hole assuming that is the design desired for the boundary of the picture.

' A target tu is prepared with a corresponding area of light or white material 3U the remainder 32 of the target t@ being opaque.

In. this manner the operator can determine the exact area or boundary lines of the picture to be exposed. When this is done, the target is then removed and the sensitized material placed in position in the holder. The mask having the desired design `ls then placed on the material and when the ex posure is made the picture when developed will be framed with a white border oi the key-hole A shape.

v an exposure to form the white border or silhouette with the mask in position either before or after lits edge abuts a- 'llhe target is' tion and expose i'or the border A, or a silhouette.

Although I have described with some degree of particularity specific details of form of construction, I do not desire to be understood as limiting myself thereby, as many changes may be made and I am not to be limited except as auch limitations may appear in the hereinafter contained claims.

I claim:

l. In a mask for forming a white border on sensitized color photographic emulsion of the reversal type, a photographic easel, upwardly extending lips on said easel, a sheet of clear transparent material adapted to cover said easel inside said lips, means to attach an opaque member to said sheet, said opaque member having a sharp photographic border edge for engaging the sensitized sheet between its periphery and the edge oi said sheet.

2. In a mask for forming a white border on sensitized color photographic emulsion of the reversal type, a photographic easel, upwardly extending lips on said easel, means on said lipsto hold said photographic paper, a sheet ci clear transparent material adapted to cover said easel inside said lips, lmeans to attach an opaque mem ber to said sheet, said opaque member having a sharp photographic border edge between its periphery and the edge of said sheet for engaging the sensitized sheet and means provided in said easel to store and receive said photographic paper.

3. In a mask for forming a white border on sensitized color photographic emulsion ci the reversal type, a photographic easel, upwardly extending lips on said easel, a sheet of clear transparent material adapted to cover said easel inside said lips, said sheet having a central portion routed out, said routed portion being coated until opaque, the balance of said sheet having a sharp photographic border edge whereby a light transmitting border is produced between said routed portion and the edge of said sheet on said sensitlzed emulsion.

. WIIMAM A. BOULAllS, da.

REFERENCES CCHTED The following references are of record in the ille of this patent:

UNITED STATES PATENTS Great Britain Dec. 29, 1938