BE621621A - - Google Patents

Description

       

   <Desc / Clms Page number 1>
 
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   Light source * uso photographic .- ..... - .- ....- --.-...... -M-0 ....-...-
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 The present invention relates to sources of exposure material, photographic materials and, in particular, light sources for use in photographic document reproduction printers *.
The present invention relates to a source of illumination specially adapted for use in a photographic document reproducer of the type comprising a device for superimposing an original document L, reproducing at a photosensitive search.
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 and to pass the document and the photononous sheet through the light source to expose the sheet
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 photosensitive to create an image.

   Useful lanineua .. sources of this type of printer generally have an elongated fora so as to extend from side to side of the documenta and they are held in a fixed position while the original document and the photosensitive sheet.
 EMI1.5
 superimposed are moved at a predetermined constant speed * passing through the light source to expose
 EMI1.6
 uniformly suocessive areas of the photosensitive sheet. sources read # inu8c8 from 0 # type ut11i.é

 <Desc / Clms Page number 2>

 
 EMI2.1
 Juâqu $ ÏCi were usually formed by tuber, fluorescent anoocidal devices. like filters, or special openings, to measure the uniformity of the irradiance along the entire length of the tube.



   The present invention relates to an elongated photographic light source, which emits substantially uniform light over its entire length and which comprises an incandescent lamp
 EMI2.2
 autumn source of alfalfa;

   - such a source of sunshine, intended for use in a photographic document reproduction printer comprising a device for moving a
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 photosensitive sheet and an original document in uuperpn 4% - tion on a predetermined path ", relative to the source of illumination and beyond this where the present invention also includes the following features. A 90H "e normally for a photographic floenaenti shot as described., said source of illumination comprises a long elect light transmitter ** extending vertically in the direction of movement of the phtoû.na1- ble sheet in the printer. ,

   an incandescent lamp assembled at one end of the front-transmitting element and a novel device for ensuring uniformity of light emission over the entire length of said element;
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 in the illumination source as described, the light-transmitting element is a rod of the shape .1 tt- -igëm z; x *% - a circular cross section or all * its length, polished end and side surfaces, and a series
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 of axial groove .. contiguous provided .. in its lateral surface, at least one of these grooves is 4'U11 'end at the other of the part of the rod e "i:

  an8m. t light to expose the photouentiblet sheet and

 <Desc / Clms Page number 3>

 
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 of edged grooves cUúen9ant at distances progr.8s1v "n '; iaBantea from the end of the rod where the limpet is placed finally, in the light source as described, the light-transmitting rod acts as a refractive element
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 pc-ur directing the light emitted by this rod towards the photosensitive sheet.



   Other features and advantages of the invention are obvious or will become apparent hereinafter.
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 In order to fully understand the nature and the characteristics of the invention, the detailed description which will follow and which has been made with reference to the drawing will be read. annexed, on which! Figures 1 and 2, including perspective views of the document printer according to the present invention;
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 -Figure 3 is a section of the til'tUe6- illustrated in figures 1 and 2, taken along a plane located .en.1-. bl ($ ml1t at ai-distance from the sides of the tïrerxsir;

   ¯ - figure 4 is a view simila1.r41 & fig * 3 mt: l.1l'Jt the elements of the printer in an inoperative position in which they are mutually spaced so that we can draw
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 loading sheet materials into the drawer) u .., - Figure 5 is a view in. perspective of element of the illustrated printer, the outer casing being open - Figure 6 eot a view? frgamentaira in perlpeo't1 .., with partial cut, of a light source used in the documenta printer;

   
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 - the figure "? is a cross section on a large scale made by 7-7 of the figure;
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 - Figure 8 is a fragmentary plan view, 111u8. tracing in detail one of the elements of the light source shown in Figure 6;

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 - Figure 9 is a section on a large scale, similar to Figure 7 of another embodiment of the source
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 Clearly, - Figure 10 is a fragmentary, enlarged perspective view, illustrating in detail the embodiment of the light source of Figure 9; - Figures 11 and 12 are fragmentary views in
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 plan illustrating embodiments of the luutineUU8 source;

   - Figure 13 is a view similar to Figure 9, illustrating an alternative structure of the light source; - Figure 14 is a ve similar to Figure 5 illustrating elements of the printer; Figure 15 is a diagram of the electrical elements of the printer;

   
The document reproduction printer according to the present invention and described herein is of the type designed from
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 taçor. to et. fully portable and operated by hand, so as not to require an external energy source which allows it to be used anywhere, The operation of this device is extremely simple and consists of advancing the sheet by hand photosensitive to the printers which then operates a generator (or generator) to send current to a lamp to expose the photosensitive sheet material. The photosensitive sheet is sent exposed and processed entirely inside the
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 the shooters, at it can be relatively "fast", because.

   that all operations are protected from light *
Since the printer used a photosensitive material
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 which is aomparr: ivamsnt sensitive to light, unlike the usual dooumenta printer in which the photosensitive material is relatively insensitive, it and unnecessary that the source of illumination of the material piiotosen-i

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 Bible is important and requires very little current for its use. It is this arrangement which enables the light source to be turned on by means of a generator in response 6. the advance by hand of the photosensitive sheet in the printer.



   Reference will now be made to the drawing which illustrates one embodiment of a photographic document reproduction printer according to the present invention. This printer comprises a housing 10 for mounting and. enclosing the elements of the printer * This casing comprises an upper casing assembly 12 and a lower casing section 14, hinged together by a hinge 16 placed at one end (called the rear end of the casing the two casing sections can pivot between the position ,

     closed or functional '. * illustrated in fig. 1 to 3, in which the elements of the printer are of a mutual operative arrangement, and the open or inoperative position illustrated in figure 4, in which the elements of them section% of the housing are spaced apart so that photographic materials can be loaded into the printer prior to use. The upper casing section 12 comprises an upper wall 18 provided with a device delimiting a passage of inlet or admission 20, and an outlet passage 22,

   by which one can respectively introduce an original document to be reproduced in the printer and remove therefrom * The admission passage 20 is delimited by corresponding walls designated for the purposes of the description, as being a front wall 24, a rear wall 26 and side walls 28. Similarly, the outlet passage 22 is delimited by a front wall 30, a rear wall 32 and side walls 34.

   The sections of the housing include delimiting parts, at the front end of the housing,

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 a removal opening 36 through which do mat1br.a de
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 photographic excavations, including reproductions $ performed by the printer, mounted removed from the housing * the removal opening 36 * and delimited by a wall
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 front end 38 adjoining the lower wall section 14 and by a front end wall 40, located * on the bottom ooctîdn -de boxier oupdrieurs'IZ, Bed end wall ufant 38 extends obliquely towards the top towards the front said bootmaker.

   and the front end wall 40 extending obliquely vertically downwards towards the front end of the boltiorg where the lower edge of the front end wall 40 co-operates with the upper edge of the front end wall 38. for 4614 milk removal opening 36 *
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 The shoemaker 10 includes 8lipérie side floors
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 42 xitueea tur the upper box soetîon 12 and> * .- # "inner side floor 44 located on the section 1 $ lower boot * 14 * The boot section 14
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 also comprises a lower wall 46 on which exits
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 mounted legs * 48 which serve & to bring the tirasse $ which are made, preferably,

   of a material like
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 rubber having a coefficient of friction elect for
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 <tBp <6h <r the printer to slide on the aurface which
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 door when not in use.
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  The functional elements of the document printer # are mounted on organs or shits !. brackets attached to the casing 10 on the upper and internal casing sections. These support members include an interior ch &) 6: 'ia or cas4re 50 comprising a bottom plate * 52 and
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 lateral speech. 54 and 56 ¯ 'extending upwards from
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 of the b & 8t plate which rests * on the lower wall 46 of the lower shoemaker section 14 Un Oh! lPt .... '. upper cndn 5e includes lut4ralon 60 * t u plates which can be pulled together by rods. 64 * leu link

 <Desc / Clms Page number 7>

 
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 side plates 54 and 56 'comprising "s.t: .iéres extensions 66, and the side plates 60 and 62 similarly having hinge extensions 68.

   The
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 hinged extensions of the upper and lower frames or frames are hinged to the hinge 16 on a common hinge pin 70. The upper frame 58 is fixed
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 inside the upper housing section 12 # and which causes this frame and this section of the housing to pivot together around the hinge pin 70.



   The printer comprises a chassis or intermediate frame 72 comprising two arms 74 articulated near their ends.
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 on the side plates 54 and 56 in the vicinity of the front ends of these side plates * The arms 74 are articulated on studs 76 fixed in the side plates bzz4 and 56, so that the inta frame, mediaixe 72 can rotate between the functional position shown in figure 3 and the inoperative position shown * in figure 4
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 which allows to load photographic ma.1; ièrea in the printer.
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  The document printer of the present invention is designed to perform reproductions of original documents by a photographic process including exposing a photosensitive sheet and processing.
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 of the photosensitive sheet! having been exposed, <'ye <! a fluid for producing a transfer image in a second sheet or image receiving sheet which is superimposed with the photosensitive sheet during the processing of
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 the latter.

   The. photosensitive sheet, referenced here 71. preferably comprises a photosensitive silver halide carried on a suitable support. the silver halide can be a gelatin emulsion, and the carrier can be any of the conventional materials. film carrier, the paper being preferable being

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 given its low price.

   The exposure of the photosensitive material can take place in one of two different types, i.e. by direct reflection. Direct exposure of the photosensitive material involves exposure of the silver halide to light through the original to the photosensitive material, and is usable when the original bears a subject only on the subject. one of its surfaces and that the material constituting the original allows actinic light to pass to the photosensitive material *
When an original has a subject on both sides' or if it does not allow actinic light to pass, then reflection exposure is used,

   which implies a transmission of actinic light through the photosensitive sheet to the surface (to be reproduced) of the original which then reflects a fraction of the light by reflecting it back on the photosensitive material, then exposing the material photosensitive to reproduce a developable image therein,
After exposure, the photosensitive sheet is trouted together with a second sheet or image-receiving sheet referenced herein as 78, superimposed with the photosensitive sheet to form a transfer image on the image-receiving sheet.

   The formatting of the image is carried out by a reverse transfer pure silver halide diffusion process, which is characterized in that it is essentially a "dry" process, in which the fluid performing the processing is. trapped between the sheets, which avoids the need to provide fluid basins in which the sheets are immersed.



   In this type of photographic transfer process, the photosensitive sheet and the second sheet are undermined, and fluid is distributed between the sheets as they are advanced. superimposed between two organs

 <Desc / Clms Page number 9>

 
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 pressers ..

   The two sheets were held in place for a predetermined time * during which a silver halide developer contained in the process fluid reduced the exposed silver halide and unexposed silver halide to silver. is transformed into a complex
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 Soluble silver that is transferred by diffusion to the image receiving scoop or is reduced to silver to form the positive transfer image * The image r4ouptrio * of images may include an image receiving layer carried on a media. 1é, like paper, or else it, can be a support for a layer in which the image is drilled.
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 For examples of methods and typical materials useful in these methods,

   one can consult the patents of the United States of America at 2 543 1 of the bzz February 1951 and n * 2 z 822 of December 15, 19 9.



  The printer includes a device to contain a *
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 reserve of photosensitive sheet 77 in the form of a long strip, the length of which is sufficient for the execution of a large number of reproductions * This device comprises a conventional reel 80 and a device placed on the side plates 54 and 56 of the frame lower 30 and serving to mount the coil by its ends so that it can pivot between the side plates inside.

   of the
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 extreme rear part of the casing 10 * the arms 74 of the intermediate frame 72 are provided with devices for venting a second reel 82 on which is wound a reserve of image-receiving sheet 78, the length and width of which are substantially equal to those of the leaf
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 photosensitive 77.

   The second sheet reef 78 where the spool 82 is enclosed in the housing 10 at the front end thereof.

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 according to the present invention, the document printer comprises a new and improved device "for exposing the photosensitive sheet and particularly for
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 8oumattro this to the two kinds of exhibition) to know by reflection and directly.

   The exposure device comprises two sources of illumination produced oontor.6mnt the meadow. ente invention, and a device for bringing the photo-visible sheet and an original document into the perforation beyond the sources of illumination in order to deflect the exposure of the photosensitive sheet * As mentioned above, an advantage of the present invention lies in the fact that the material of the photosensitive sheet can be very
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 a> ns1bl. at the 11th ... because the photosensitive sheet this kept away from light before and during its
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 exposure and its treatment.

   and the use of a rapid photographic lens permits the use of a source of illumination which need not be expected as intense as if the photosensitive sheet material were to be manipulated in light.
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 the two illumination sources according to the present invention are basically the same; each has a
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 elongated shape, it does not extend transversely to the throw of the phOtosensitive sheet and is designed so as to emit substantially uniform illumination over a length at least
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 .ale to the width of the area of the original to be reproduced.



  Each light source includes a long rod at rod 84,
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 which is preferably cylindrical and whose emotion t gas vereale is uniform over its entire length. Rod 84
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 has end and side surfaces, and is made of a transparent material, such as glass
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 or a * maU'r. organic plastic, acrylic resides sold * or @ Ion marked deposited 'Lucite' (E.l. du Pont de Nemours and Cy) and .Plexiglas .. (Rhom and Haas 00.) suitable

 <Desc / Clms Page number 11>

 particularly for this purpose.

   In the embodiment shown, the rod 84a. the property of transmitting light, introduced at one of its ends, along the length
Sweat from the rod to its other extracted by internal reflection, and it emits light along its entire length because its side surface has a series of rays in the form of axial grooves configured 85. These grooves preferably have a section transverse V-shaped and each includes two surfaces having matte finishes.



  The set of grooves constitute a diffusely reflective surface which reflects the light transmitted by bar 84 radially therethrough causing light to be emitted from the literal surface of the bar. diametrically opposed to the grooves 85. The faces or surfaces of each groove are poor. for example, be disposed approximately 90 ° from each other and, in one embodiment of rod 84, each groove occupies about 5 of the side surface of the rod or bar.



   In the illustrated embodiment preferred by the Applicant, six of these grooves extend from one end to the other of the portion of the rod 84 from which the light is emitted * to expose the photosensitive sheet. Since the intensity of the light transmitted from one end of the rod decreases with the distance from that of the ends of the rod to which the light is introduced, the grooves are arranged so as to ensure uniformity of the light. 'light emission over the entire length of the light-emitting portion of the rod. According to the present invention, the result is obtained by saving,

     a * succession of grooves which begin to distance progressively increasing from the end of the rod to

 <Desc / Clms Page number 12>

 
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 which the lumen is introduced, the successive grooves being disposed on opposite sides of the full length grooves and the previous partial length grooves, as illustrated in FIG. 8. The distances between the starting points of successive grooves and the light transmitting end of the stubborn rod determined empirically for various shapes of rods and light transmitting grooves.

   For example, to make reproductions of documents 216 mm wide, we used
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 a 15 # 8 na diameter "Luoite" rod, a.ppro ximAt1Ymcnt 250 m in length and polished end and side surfaces. The shank had six grooves with full length, starting at 12.7mm from a polished end
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 of the shank, each groove occupying in, irôù 5 * of the surface of the shank and having matt surfaces arranged approximately perpendicular * The shank had twelve grooves of
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 partial lengths starting progressively oroialte8 distances from the end of the rod.

   The following table shows the distances between the starting points <se ruinur s successive i 25.4 mm 16.54 mm
 EMI12.5
 24.13mm 17.65 nua 22.86mm 16.76mm 21.72mm 16.00mm 20.57mm 15.24mm 19.56mm 14.48mm.
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  Of course, all the grooves extend 3Jsqt 'at the end of the light emitting part of the rod which is the farthest from the source of illumination. The applicant plans to tell a source of light.
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 as uAe incandescent lampib, at each end of li 'tigw, e; in this case, the points of departure and arrival 's

 <Desc / Clms Page number 13>

 
 EMI13.1
 grooves of partial lengths oeraî # 4t arranged .at progressively increasing distances: from both ends of the rod.



   As previously mentioned, the raine ?? '
 EMI13.2
 reflect the light diametrically through the rod and through a part of its lateral surface which this arranged diametrically opposite the groove? the ag3 * - ment has 1 additional advantage of making the rod similar to a refracting .element or cylindrical lens
 EMI13.3
 the light to concentrate the mi8 'light by the rod # which makes the light more concentrated on the photosensitive sheet.
 EMI13.4
 



  Another kind of 11'r. Transmitting rod, bearing the reference 84, is illustrated in Figures 9 to 1> and by its structure it emits the leunsx over its entire length thanks to the presence on its Q, # side tace of a * series of recesses 2850 These recesses preferably have the shape of a channel ", has grooves of the type obtained by cuts with a saw, they extend transversely, .. ment to the axis of the rod 284 and are parallel, The total
 EMI13.5
 of the recesses provides a diffusely reflective surface which reflects the light, put by the rod, radially therethrough, so that the light is emitted from the lateral surface of the diametral rod.
 EMI13.6
 ment, the opposite of recesses.



  In the preferred embodiment, illustrated in
 EMI13.7
 the tlg * 9 to Il $ the recesses are rectilinear and parallel channels or grooves each having parallel side walls and a bottom wall which is flat and connects perpendicularly to the side walls, so that the cross section of the recess is rectangular and the back wall is a chord
 EMI13.8
 of the cylindrical side surface of the rod. We have. noted

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 that the amount of light reflected by the recesses and emitted by the rod opposite the recess has a direct relationship with the area of the surfaces of the bottoms of the recesses.



  Since the intensity of the light transmitted from one end of the rod to the other end decreases with the distance from the end of the rod at which the light is introduced, the recesses are left. so as to ensure uniformity of light emission over the entire length of the part of the rod which emits light. In the embodiment shown, the recesses all have a uniform width and spacing, so that one obtains uniformity of light emission by varying the depths and, consequently, the lengths and surfaces of the recesses in proportion to the distance between them and the end of the rod to which the light is introduced.

   In the embodiment shown, the recesses are arranged in groups which are substantially identical in each group. The bottom surface of each greed has a matte or roughened finish so that the surface is diffusely reflective.



   The arrangement and dimensions of a typical light-emitting rod were determined for. for example, performing reproductions of documents 216mm wide * A 15.8mm diameter rod made of "Lucite" having an approximate length of 250mm, as well as polished end and side surfaces can be used. This rod is manufactured according to the following table, in which the groups of recesses are numbered in succession from the end of the rod to which the. light is introduced.

   All the recesses are 1.58 mm wide, their center line is 2.54 and the table mentions the number of recesses in each group as well as the depth of the recesses.

 <Desc / Clms Page number 15>

 recesses calculated so as to give a first group of recesses 7.14 mm long followed by groups of which the. length increases 0.79 mm until the last or twelfth group has recesses approximately 15.8 mm long.



   BOARD
 EMI15.1
 
<tb> Group <SEP> n <SEP> Number <SEP> of recesses <SEP> Depth <SEP> (on <SEP> mm)
<tb>
<tb>
<tb>
<tb>
<tb>
<tb> 1 <SEP> 10 <SEP> 0.8382
<tb>
<tb>
<tb>
<tb>
<tb>
<tb> 2 <SEP> 9 <SEP> 1.0668
<tb>
<tb>
<tb>
<tb>
<tb>
<tb> 3 <SEP> 9 <SEP> 1.3298
<tb>
<tb>
<tb>
<tb>
<tb>
<tb> 4 <SEP> 8 <SEP> 1,6002
<tb>
<tb>
<tb>
<tb>
<tb>
<tb> 5 <SEP> 8 <SEP> 1.90 <SEP> sa <SEP>
<tb>
<tb>
<tb>
<tb>
<tb>
<tb> 6 <SEP> 8 <SEP> 2.2850
<tb>
<tb>
<tb>
<tb>
<tb>
<tb> 7 <SEP> 7 <SEP> 2.6670
<tb>
<tb>
<tb>
<tb>
<tb>
<tb> 8 <SEP> 7 <SEP> 3.1496
<tb>
<tb>
<tb>
<tb>
<tb>
<tb> 9 <SEP> 6 <SEP> 3.6576
<tb>
<tb>
<tb>
<tb>
<tb>
<tb> 10 <SEP> 6 <SEP> 4.3180
<tb>
<tb>
<tb>
<tb>
<tb>
<tb> 11 <SEP> 6 <SEP> 5.4864
<tb>
<tb>
<tb>
<tb>
<tb> 12 <SEP> 6 <SEP> 7,

  9248
<tb>
 
Dn has various means to increase the sound. total of the areas of the bottom surfaces of the recesses, in order to increase the output of the rod omit light and, therefore, the proportion of light emitted by the rod in relation to that which is introduced into it, while. keeping the arrangement of the recesses, For example in the embodiment shown in Fig. 12, the recesses can be formed with a cutting tool, such as a profiled tang so as to cut a bottom surface having a cross section? in V.

   In this case, the bottom surface, which is actually two surfaces, would extend in a straight line in the form of a chord of a circle. Dana one

 <Desc / Clms Page number 16>

 Another embodiment (not shown), the bottom surface of each recess could have a curvilinear cross section.



     It is illustrated in FIG. Still another means for increasing the area of the bottom surfaces of the recesses In this embodiment, the bottom surface of each recess does not extend over the chord of a circle, but it is curvilinear. Recesses of this type can be formed by means of a plunge cut with a circular cutting tool, such as a circular tang *
Although the recesses have been shown in the form of channels or grooves of the kind produced by a conventional tang or mill, other types of recesses are included within the scope of the present invention, including recesses under shape of holes obtained, for example,

   by drilling and arranged in such a way as to occupy zones whose dimensions increase in proportion to the distance which separates them from the end of the rod where the light is introduced *
Each of the rods 84 or 284 is enclosed in a cylindrical tube 86, made of a material, such as metal. not allowing actinic light to heal up to the photosensitive material, and it has an axial slit 88 the length of which is equal to the emitting part of the stem of the stem, that is to say to the total length of the grooves or areas with recesses.

   The inside diameter of the tube 86 is only slightly greater than the outside diameter of the 64 of 284 rod, so that the tube tightly surrounds the rod, the slot 88 is disposed diametrically opposite the grooves 85 or the recesses 285. , the axis of the slot was diametrically; oppoa4 to the axis of the grooves or slots of; total length. One of the light sources includes; a rod 84 or 284 and the tube 86 is mounted on the saction

 <Desc / Clms Page number 17>

 
 EMI17.1
 4th upper casing 12 and the other is mounted on the lower casing section 14.

   The photo8.nJJ1ble sheet and the original are guided in superposition so that c9llt "oi
 EMI17.2
 can be subjected to a reflection exposure or to a * direct exposure, One of the tubes 86 * and mounted at one end in the side plate 56, while its other end section, referenced 90, through an opening
 EMI17.3
 provided in the side plate 54.

   The other tube 86 is similarly mounted so that one end of it is secured in the side plate 62 and its other end station, also referenced 90i, passes through an opening in the side plate 60.
 EMI17.4
 The sources of the tranamiQ9 light by the rod * have
 EMI17.5
 lUl.e8 to incajcieseunce 92, which are # oa-fcées within the end section 90 of a tube 86 in the vicinity of lustr-
 EMI17.6
 mothballed from the stem contained therein. Each lamp 92, which can be extremely small since there is no need for large illumination requirements, is mounted in a reflector 94 carried by an end cap 96 which is attached to the end section 90 of the tube.

   The tubes 86 and the rods which they contain are shown in such a way that their axes are parallel and that the slots 88 are opposite,
 EMI17.7
 and are used alternately to subject the photosensitive sheet to either direct exposure or reflection exposure *
 EMI17.8
 The guide device provided in the present invention comprises a cylindrical tube 98, made of a material such as glass or an organic plastic material capable of transmitting actinic light to the photobible material. Tube 98 has an internal diameter which is greater
 EMI17.9
 to the outside diameter of the tube 66. and it is mounted so as to surround the latter which is mounted on the upper frame 58.

   Two long guide rollers 100 and 102 are arranged

 <Desc / Clms Page number 18>

 
 EMI18.1
 '1 6. J. Ii J'il so that their axes are parallel to each other as well as to the axes dot rods 84 'or 284 and tubes 86 # and they are placed so as to bear against the tube 98 at the beams
 EMI18.2
 mutually spaced on the periphery of the side surface of the tube 98. The guide rollers 100 and 102 are preferably comprised of surface portions having a certain degree of friction, and a high coefficient of friction of materials such as rubber. .

   A 4.f9u1 roller 104 is mounted for its rotation, on and between the side slats 62 and 64 in a position where it pushes the tube 98
 EMI18.3
 against lake guide rollers 100 and 2.
 EMI18.4
 photosensitive sheet 77 is thinned from spool 80 between guide roll 100 and tube 98 around
 EMI18.5
 part of the cylindrical or lateral surface of uh8f as well as between the guide roller 102 and 1 tuba 98.

   The tents 88 of the tube 86 are arranged so as to transmit the light from the rods 84 or 284 to expose the part of the photosensitive sheet which is supported by the tube 98 between
 EMI18.6
 the guide rollers 100 and 102, and the light sources are designed to be used adloctivemtrt and one at a time to expose the photosensitive sheet as it is advanced around the portion of tube 98 between the guide rollers 100 and 102 beyond the slots 88 of the tubes 86,
4during the exposure of the photosensitive sheet 77
 EMI18.7
 an original document - referenced 106 out the fis. 3 - is superimposed with the photosensitive sheet between the latter and the tube 98.

   The oriSihal is introduced through the passage 20, and devices are provided for .mp3cher the light from entering * in the passage as well as to guide and anenur the original in superposition with the photosensitive sheet 17, at the line of clamping of the roller 100 and the tube sa, î "a the embodiment shown these devices 4 * 4ohnchêlt z la

 <Desc / Clms Page number 19>

 light, guide and supply are formed by two input and supply rails 108. which are mounted, for their totalation, in juxtaposition so that their axes are parallel, inside the casing 10, on and between side plates 60 and 62.

   The rollers 108 include resiliently deformable surfaces, and are arranged so that their nip line is aligned with the inner end of passage 20, in a position where they can nip the original 106 and advance it to the left. 9e tube clamping line and 100 guide roller.



  The infeed and feed rollers 108 pinch the original on. along a line lying in a plane substantially tangent to the surface of tube 98, at a hand line closely adjacent to the line of contact between tube 98, and guide roller 100. At least one of the rollers 108 is driven so as to advance the original through passage 20 into the clamping line of tube 9 and guide roll 100 between this tube and photosensitive sheet 77.



  A lumen proof member 110 extends downward from the rear wall 26 to the rear of the rearmost infeed and feed roller 108, and forward to the rear. in the vicinity of the clamp line of tube 98 and guide roller 100 to prevent the photosensitive sheet from being clouded by light transmitted through passage 20.



   To bring the original 106 from the casing through the passage 22 after exposure of the photosensitive sheet in superposition with the original, two feed and exit rollers 112 are provided, which are mounted, with a view to their rotation, in juxtaposition and so that their axes are parallel, on and between the side plates 60 and 62. ' The structure of the output rollers 112 is similar to that of the input rollers 108, and the rollers 112 are

 <Desc / Clms Page number 20>

 arranged so that their pinch line is placed at the inner end of outlet grooming 22, in a position where they can pinch the original along a line lying in a plane substantially tangential to the tube 98 and the roller guide 102.

   The document printer is designed to reproduce originals which are substantially flat and tend to assume a planar configuration, so that when an original 106 is fed from the nip line of tube 98 and roll of guide 102, the leading edge of the original tends to move in a plane tangential to tube 98, guide roller 102, and exit rollers
112, so as to enter the roll clamping line
112 and to pinch it. At the monk one of the exit rollers 112 is driven so as to advance the original from the housing into passage 22.

   An additional light-sealing device has been provided for the outlet passage 22 and, in the illustrated embodiment, is constituted by a light-sealing member 114 extending downwardly from. of the front passage wall 30 around the exit roller
112 located furthest forward, to the vicinity of guide roll 102. Lumen seal member 114 further serves to help guide the leading end of the original from the nip line of the original. tube 98 and guide roller 102 into the nip line of exit rollers 112. the housing includes an interior wall 116 extending between front passage wall 24 and rear passage wall 32.



  On this inner wall 116 is mounted a light-proofing element 118 comprising a first downwardly notched portion 120 which does not extend downward between the frontmost inlet roller 108 and the tube. 96, and a second downwardly facing portion 122 which extends from the vicinity of the uppermost exit roll 112.

 <Desc / Clms Page number 21>

 up to the vicinity of the tube 98. This second descending part 122 cooperates with the lower part of the lumen sealing element 114 to define a passage serving to guide the original from the line between the tube 98 and the guide roller 102 into the nip line of the output rollers 112.



   As previously mentioned, the exposed photosensitive sheet 77 is treated to obtain a positive proof or co-production of the original by superimposing this sheet with a second sheet 78, or proof receiving sheet, and dispensing a processing fluid between them. sheets stacked to form a sandwich.

   The devices mounted in the printer according to the invention for carrying out this treatment are two pressure rollers 124 and 126, the roller 124 being mounted for rotation on the intermediate frame 72 and the roller 126 being mounted on the; lower frame 50, so that the axes of the rollers lie in a common plane when the printer is in the functional position illustrated in FIG. 3. the rollers 124 and 126 are placed in the vicinity of the guide rollers 102 and the roller 126 is mounted so as to be able to move towards and away from the roller 124 to a limited degree, a spring 128 serving to bring the roller 126 closer to the roll 124.

   Photosensitive sheet 77 extends from the nip line of tube 98 and guide roller 102 between rollers 124 and 126, and image-receiving sheet 78 is fed from spool 82 around roll 124 in superimposition with the photosensitive sheet between the rollers 124 and 126.



  By mounting the spool 82 and the pressure roller 114 on the intermediate frame 72, the photosensitive sheet and the image-receiving sheet can be threaded in superposition between the pressure rollers.

 <Desc / Clms Page number 22>

 



   In the illustrated embodiment of the document printer, the processing fluid for each exposed area of the photosensitive sheet is fed to the. photosensitive sheet as a long mass extending across the exposed area of the sheet near the leading edge of the exposed area, i.e. over the portion of the photosensitive sheet which extends between the guide roller 102 and the nip line of the pressure rollers 124 and 126.



  The advance of the photosensitive sheet and the second sheet superposed between the pressure rollers causes this mass of fluid to be distributed between the sheets towards the rear end of the exposed area of the photosensitive sheet. It is intended that the processing fluid required for each exposed area of the photosensitive sheet, in order to produce a positive print on the image-receiving sheet, will be supplied in an elongated tubular bag very similar to a tube. classic drinking straw * This bag, bearing the reference 130 in fig. 3, comprises a cavity which has a substantially uniform cross section and the length of which is approximately equal to the width of the exposed area of the photosensitive sheet,

   this cavity being full of treatment fluid. The two ends of the bag are sealed to prevent escape of fluid and entry of air into the bag, and one end, called the rear end, is made to peel off under the effect of a hydraulic pressure created within the fluid, to form a discharge mouth having a section preferably equal to the cross section of the cavity full of fluid and through which the fluid contained in the bag is discharged.

 <Desc / Clms Page number 23>

 
 EMI23.1
 



  The printer has a device for inserting the bag into the printer so that it extends to and near the portion of the photosensitive sheet between the guide roller 102 and the printer. This device is described and illustrated in detail in the Belgian patent application filed by the applicant on August 22, 1962 under number 496,669 and it comprises a chamfered opening 136, made in the lower side wall 44.

   Inside the housing is mounted in alignment with the opening 136 a U-shaped guide member 138, which extends from this opening into the housing beyond the edge of the photosensitive sheet to support and guide it. bag 130 into the box, in a
 EMI23.2
 position om it extends to the right and near the photo s onsible sheet. The bag is introduced into the shoemaker until
 EMI23.3
 its front end is near the merge of the photosensitive sheet furthest from the opening 136 and JU $ that J,) <* # that the front end of the full 4th fluid cavity is near the side edge of the exhibition area.

   The bag is then compressed to a position in the region of the edge.
 EMI23.4
 from the exposure area closest to the cuvertufit 136, and at the same time removing it from the printer through the opening-
 EMI23.5
 re 136. This operation takes off the front end of the sachet and its contents in 6st ejected in the form of a long mata * uniformly distributed waiting on the part of the photosensitive t.U111e which is between the guide roller, 102
 EMI23.6
 and the press rollers a.



   A device is provided for compressing the sachet, as described, while it is being removed to cause the fluid to eject from the sachet. This device includes.
 EMI23.7
 wie curved curvilinear lip vars the top lying on the be-. inner rim of the guide member $ 13 and an air- lip

 <Desc / Clms Page number 24>

 
 EMI24.1
 juxtaposed responder located on the inner end of a pressing member 144 of U-shaped section, which is mounted so as to be able to pivot to a degree of limitation inside the guide member 138 so that the latter and the member presser cooperate to form a tube through which one introduces and one
 EMI24.2
 removed the straw-shaped bag.

   A hand operable pushbutton 146, which is mounted in a recess of the top wall 18 and the side wall 42, comes out to pivot the presser member 144 so that the lip of the member 138 is pushed. towards the lip of organ 144 to compress the sachet. Push-button 146 actuates a rod-
 EMI24.3
 plunges .. extending inward z. from the upper side wall 42 and bearing con "rra the presser member 144 to pivot it towards the guide member 138 when the button 146 is depressed.



   The photosensitive sheet and the proof-receiving sheet which form part of the sandwich formed by the pressure rollers 124 and 136 must remain superimposed for a predetermined period of imbibition (treatment), during
 EMI24.4
 which the sandwich is kept in the dark and to, 1gex ± tra tion of which it can be brought to the light and the leaves separated. The printer has a device for traw-aporq'tr the sandwich in the housing away from light and then guide it from the housing into the opening d9xl, e. ment 36 (to close it). This device comprises two rollers 156 and 158 mounted in juxtaposition in the casing very close
 EMI24.5
 removal opening 36.

   Rollers 156 and 158 preferably have surface layers of a flexible material having a high coefficient of friction, rubber being desirable for this purpose. Roll 158 is
 EMI24.6
 mounted in view of its rotation on the lower frame 5Crëa near the front side wall 38. The roller 156 is mated * by its ends for its rotation on the arms 1t)

 <Desc / Clms Page number 25>

 hinged to intermediate frame 72. Den springs. torsion 162 serve to bias the arms 160 to push the roller 156 towards and against the roller 158 when the printer is in the operational position shown in Figure 3.



  Thanks to the mounting of the roller 156 on the intermediate frame 72, this roller can be separated from the roller 158 when the printer is in the open position shown in FIG. 4, which allows the photosensitive sheet and the second sheet to pass over the pressure rollers. 124 and 126 only between the rollers 156 and 158. Tabs 154, formed * eur the lower part of the arms 74 of the intermediate frame 72, are used to bear against the arms 160 and to act as a stop for the pivoting of these arms. when the midframe swivels to an open position.



   The documenta reproduction printer according to the present invention is intended, as mentioned previously, to be actuated by the operator who, for this purpose, grasps and pulls part of the sandwich, comprising the photosensitive sheet and the second sheet tapping protruding out of the casing, through the removal passage 36. To actuate the printer in order to perform a reproduction, the operator introduces a bag 130 into the housing through the opening 136, he presses the push-button 146 and hold it down while removing the bag from the housing.

   This results in sending an elongated mass of fluid over the portion of the photosensitive sheet which extends between the guide roller 102 and the pressure rollers 124 and 126; then feeds an original 106 into passage 20 until its leading edge is at the nip line of feed and feed rollers 108, after which it grips the end portions of the feed. photosensitive sheet and the second dig which extend into passage 36 and it pulls these digs to advance them into the printer.

   It is during

 <Desc / Clms Page number 26>

   this advance that (1) - the original is brought into superposition with the photosensitive sheet between it and tube 58, and (2) - the photosensitive sheet is exposed and the exposed zene of this image-receiving sheet between them. pressure rollers to distribute the fluid and form a sandwich which is advanced from the pressure rollers to the rollers 156 and 158 and from there, from the printer, through the removal passage 36.

   The printer comprises a transmission driven by the friction of one of the sheets with one of the rollers, and connected to the various elements of the printer, in order to carry out the introduction and the output of the original, and the exposure. of the photosensitive sheet.

   In the embodiment shown in FIG. 14, the transmission is driven by the friction of the photosensitive sheet with the roller 158 and it comprises a succession of mutually engaged torque transmitting organs, such as pinions or gears. friction elements, the latter being shown as the preferred type because of the large number of friction elements which are called upon to cooperate on various frames. ais. The transmission comprises a first friction roller 166 secured to the shaft on which the roller 158 is mounted, and a second friction roller (idler) 168 which is mounted on the side plate 56 of the lower frame 50 and which rubs against it. the friction roller 166.

   Each of the output rollers 112 is frictionally connected to a friction roller 170, and one of the friction rollers 170 rubbing against the second friction roller 168 which transmits torque to the friction rollers 170 against which it rubs to. rotate the output rollers 112, Torque is transmitted to the input rollers 108 by a friction roller

 <Desc / Clms Page number 27>

 idler 172, which rubs against one of the friction rollers 170 in conjunction with one of the friction rollers 170, and against one of the friction rollers 174 of a second pair of rollers in conjunction with the friction rollers entry 108.

   It only takes one of the exit rollers 112 to be positively driven to feed the original from the case when the leading edge of the original has been fed from the nip line of tube 98 and guide roll 102 into the chamber. output roll pinch line 112. In this case, the other friction roller 170 (would simply function as an idle roller to transmit torque from the friction roller 170 to the idle friction roller 172.



   The document printer according to the present invention is designed to be operated by hand without the need to provide an external source of energy, and current for the sources of illumination, that is to say. say the lamps 92 'is obtained by hand in conjunction with the advance and processing of materials :! The current for the lamps comes from an alternating current generator (or a generator of direct cost) 176, connected to the transmission by a friction drive roller 178 and an idle friction roller 180 attached to the same shaft than the crazy friction roller 172.

   The source of copper
176 is shown as being mounted on the top wall
18 of the upper housing section between the inlet passage 20 and the outlet passage 22. Reference will now be made to FIG. 15 which is a circuit diagram controlling the electrical connections between the current source 176 and the lamps. 92, and a system for determining (1) which of the two lamps is to be used for the exposure, and (2) its intensity.

   One of the terminals of the current source 176 is grounded in the chassis and, the other terminal is connected to a rheostat 182 having

 <Desc / Clms Page number 28>

 
 EMI28.1
 Separate parallel windings are connected in series respectively to the lamps 92.The structure of the rheostat is such that only one of the windings is used at a time at any time, so that only one of the lamps lights up. A control and adjustment knob 184, mounted on the rheostat outside the housing, allows one or the other of the lamps to be used selectively and its intensity to be adjusted.



   The exposure of the photosensitive sheet and the duration of the treatment of this sheet and of the receiver sheet
 EMI28.2
 The image speed will depend on the feed speed of the sheets in the printer and, consequently, the feed speed of the sheets in the printer must be adjusted. For this purpose, the printer comprises a regulator 186. This can
 EMI28.3
 be of a conventional meoah1qu8 type mounted, for example, in the axis of the generator (or of the generator) 176 on the same shaft, or else, as in the illustrated embodiment, it can be mounted apart from this source of current 176 and
 EMI28.4
 be connected to the transmission by a friction drive roller 188 which rubs against the idle friction roller 180.

   The regulator limits the speed of the transmission and thereby regulates the current emitted by said current source and hence the intensity of the lamps 92; Moreover, he
 EMI28.5
 re18 the speed at which the photosensitive sheet is moved daiia the printer, which leaks the. The length of time that any part of the photosensitive scan is exposed to light from rods 84 or 284 is substantially predetermined and constant. the life-
 EMI28.6
 As for the movement of the sandwich, including the exposed photosensitive sheet and the image receiving sheet, from pressure rollers 12a and 126 to rollers 156 and 158 is also set so that the period of treatment or
 EMI28.7
 the imbibition has a pr <"eteratiKt'-e constant duration.

   

 <Desc / Clms Page number 29>

 



   When copying a document, traction is exerted on the protruding portion of the sandwich on the printer out of the opening 36, until a predetermined length of the two sheets has been fed through. the printer. This length is approximately equal to that of the document being reproduced, plus an excess length sufficient to fully advance the portion of the sandwich containing the reproduction through the opening 36 into the printer.

   A measuring mechanism can be provided in the printer and coupled to the transmission to measure the length of the sheets fed into the printer for each reproduction, or the sheet materials can bear indications visible to the operator // / to indicate when a sufficient length of sheets a. , been advanced into the printer.

   The aforementioned excess of languor of the sandwich is obviously - 'at least equal to the length of the path followed by the sheets between the guide roller 102 and the opening 36, and it can -, in one embodiment of the printer - serve to trap and retain any excess processing fluid distributed between the sheets beyond the trailing edges of the exposed area of the photosensitive sheet and the image-receiving area of the second sheet
Quhad a length of the sandwich, containing a reproduc- tion of an original has been fed from the printer through the removal opening 36,

   this length is then cut. sandwich in the region of the removal opening to separate it from the part of the sandwich which remains in the printer * The sectioning of the sandwich is obtained by means of a cutter bar 190 mounted on arms 192 which are articulated on . the upper frame 58. These arms pass through slots formed in the front end wall 40; the cutter bar 190 is mounted outside this wall and it

 <Desc / Clms Page number 30>

 can pivot between a position where its lower edge 194 is just above the opening 36 and a second position where it is below this opening and abuts against a shoulder 196 located at the junction of the end wall front 38 and the lower wall 46.

   By pivoting downward (clockwise from Figure 3), cutter bar 190 wedges a short section of the sandwich centered on end wall 38, and this section of the sandwich serves as a primer that can be grasped after severing the sandwich by tearing it against the edge 194 of the cutter bar that can occasionally be sharpened to facilitate this operation.

     A torsion spring (not shown) can be fitted to push the bar (counterclockwise with respect to figure 3) and bring it to the upper position shown in the drawing, in which the The operator can grasp the section of the sandwich extending into opening 36 to feed the sheets into the printer to perform reproduction of an original document.


    

Claims (1)

CLAIMS 1.- Illumination source for exposing a photosensitive material moved in front of and beyond said source in a camera, this source comprising a long one. rod having a round cross-section substantially uniform over its entire length and emitting light in a radial direction over its entire length, characterized in that the aforesaid rod (84,284) is made of a transparent material capable of to transmit light by internal reflection over its entire length, a lamp (92) being mounted at least at one of the ends of said rod, the peripheral or lateral surface of this rod comprising a series of indentations (85, 285) which cover an area extending from end to end of a section of said rod for emitting light by constituting diffusely reflecting surfaces over an area having a circumferential dimension which gradually increases from the end adjacent to the aforementioned lamp leads to diffuse reflecting surfaces serving to reflect the light emitted by this lamps through the rod so that the light comes out of the rod at the location of a part of the aforementioned peripheral surface which is 4 the opposite of the aforementioned indentations 2.- Illumination source according to claim 1, characterized in that an opaque tube (86) surrounds the aforementioned rod (84) and comprises, a slit (88) disposed longitudinally in the vicinity of the aforesaid part of the aforementioned peripheral surface through which the lumen serves as the rod. 3, - Illumination source according to either of claims 1 and 2, characterized in that the tube (86) comprises an end section which extends beyond the end of the rod adjacent to the lamp (92) and which supports and the lamp. <Desc / Clms Page number 32> EMI32.1 4. Solar source according to either of claims 1 to 3, characterized in that the aforementioned peripheral surface of the rod (84, 264) and the terminal surface of the rod in the vicinity of the lamp are polite. 5.- Illumination source according to claim 1, characterized in that the aforementioned indentations are constituted by a series of stripes (85) which extend in the longitudinal direction of the aforementioned section of the rod used to emit the light, at least one of these stripes is EMI32.2 stretching from one end to the other of said section and other of these stripes starting at successively increasing distances from that of the ends of said section which is closest to the lamp (92), all these stripes - Receipt extending to that of the ends of said section which is furthest from the lamp (.figures 6-8). 6.- Illumination source according to claim 5, characterized in that the aforementioned stripes (85) are continuous axial grooves. EMI32.3 7.- Illuminated source according to either of claims 5 and G, uarctéri8é in that each of these stripes has a substantially V-shaped cross section and comprises two surfaces having a matte finish. 8.- Illumination source according to claim EMI32.4 7. characterized in that the ourfuceo of each of the above-mentioned raizures (bzz make between them a -J '; Jle of about 909. 9.- Source of solar energy according to either of claims 4 and 5, characterized .n that l3ea successive stripes (85) cocuiiençunt with increasing di: Jtril1ceo aucceesivtlaent will start from the aforementioned end of said 'section which is closest to the lumpu (92%) are arranged 3s on opposite sides of the aforementioned stripe. 10.- Source of lightning according to the resale kbion 1, <Desc / Clms Page number 33> EMI33.1 characterized in that the aforementioned indentations * constitutes! a series of evidoments (265) dia laid in adjacent groups along the length of the. rod (284) will hollow out the groupât, successive to part of the group closest to the end of the rod adjacent to the lamp (92) covering growing mon8.prOgr.8e1 vement and not extending into the rod juoqulà pro - increasing foundry. EMI33.2 11.- Source of illumination according to rovendloatton 10, characterized in that leadits dvidementla (2S,) have the closure of closely adjacent channels which await transveraa- lemexi4y, in the direction of the length of the rod (284) * 12.- Light source ",. Nt according to revend1cat 11, characterized in that the aforementioned channels are said in mlG unifornieaent spaced parallel relation, the ion- flueura and the depths of the channels of each group sucoesB1t being greater than the lengths and depths of the channels of the previous groups 13.- light source according to claim 11, characterized in that each channel has a generally rectangular cross-sectional configuration comprising two mutually facing side faces and a surface of EMI33.3 background that has a matte finish in order to reflect light diametra.-. .emer.t across the lise. 14. - Illumination source according to claim 11, characterized in that the aforementioned tie (284) has a substantially uniform cross section over its entire length. 15.- Source of lighting according to one or the other EMI33.4 dea claims 10 to 13, characterized in that the bottom surface of each of the aforementioned channels (285) is substantially planar and extends over a chord of a circle which constitutes the peripheral surface of the rod. 16.- Source of lighting according to one or the other <Desc / Clms Page number 34> of claims 10 to 13, characterized in that each bottom surface of said channels (285) is curvilinear inwardly, 17.- Source of illumination learned one or the other dco claims 10 to 13, characterized in that the aforementioned facing lateral surfaces are generally flat and parallel, the bottom surfaces being generally cylindrical. 18.- Illumination source according to one or more of claims 10 to 13, characterized in that the said facing surfaces are generally flat and parallel, and the bottom surfaces have a V-shaped cross section.