DE1797329A1 - Film cassette and photographic camera - Google Patents

Description

PATENT LAWYERS, 7 STUTTGART 1

DRYING. WOLFF, H.BARTELS, ■ te ^ fon'S »οίο and» 7295

DR.BRANDES, DR.-ING.HELD 0 * ^{1/22 rELB} * lfi2 ^m hL & xat 19ÖÖ

Reg.-Np. 121 501

Eastman Kodak Company, Rochester, New State 3fork, United States of America

Film cassette and photographic camera.

The present invention relates to a film cassette for a photographic camera with a rear 'cassette part' is one thing Aix press area for the film strips,

and with a front cassette part, daa ^.

is provided with an exposure aperture In particular, the invention relates to cartridges with roll film supply and take-up chambers in ·

der * Art, vile Bio auo the US-Fatenben-3 138-.Ό81 and 3 138 084 odar'dan.rlmibsahösri patents 1 105'15O, 1 ISC 070 and 1 196 O'fl- "ii ■" «· '«. The Erflmh'n;,; ii.ifefiirfc. a-over a-me

In .ilo'.dle ffilra

009 8 5 2/09 4 5 BADORJGINAt

In the case of those described in the patents cited above Cassettes are used to determine the position and flatness of the respective film section to be exposed with the aid of a flat film pressure surface reached, which is on the rear cassette part behind the exposing film section is located. The front cassette part, which is molded independently of the rear cassette part and is only connected to the same when assembling the cassette, has a BellohtungsOffnung and a guide for the see below exposing film section, which is connected to the film pressing surface cooperates to ensure the required distance between the exposure opening and the rear cassette part. In the case of already known cassettes of this type, the front cassette part forms in the vicinity of the exposure opening at the same time a support surface · This support surface engages with corresponding camera parts and thus determines the position of the cassette to the camera lens, so that the film section in the focal plane « of the lens comes to lie.

However, the film pressing surface on the rear of the cassette must in their position in relation to the lens of the camera with great accuracy be fixed. Therefore, the use of the support surface on the front cassette roll requires defining the position of the film section »regarding the lens that the two Knasetfcentei.lö are put together with a correspondingly great accuracy in order to ensure a precise, fixed arrangement of the film, to ensure the contact surface and the contact surface on the front cassette part to one another

009852/0945

GAS

BATH ORIGINAL

1797323

us-.

Highly manufactured and known from patent specification 3 133 08l, the two cassette parts are made of plastic, the exact position of the two ropes joined together is achieved by inner bearing surfaces To obtain flawless cassettes, this form of construction prescribes a correspondingly high degree of accuracy in the manufacture and maintenance of the molds used for the manufacture of the cassette parts and an equally precise control of the Pormguü and honing work o During these conditions by highly qualified technicians using highly developed production equipment In practice, new considerations about a usable cassette with & eia ₉ ä £ © teofident one

the »cassette © lsi fei? -! distant guarantee = _a a dig '..'.

/ Cassettes should be produced in quantities »which do not justify a purchase ® & f the use of such highly developed production devices and processes«,

With other film cassette constructions, this milling problem is countered by ensuring that "the film is in direct contact with the camera in the area of the exposure aperture". Bqv film is pressed against the camera by a spring or a pressure pad. However, the pressure exerted directly on the film differs from camera to camera, with either the force required to advance the film

009852/0945

BATH ORIGINAL

© toe alshfc can be influenced © represents variable or while "" Filraforfcsslmlnung dtr pressure by a complicated Mechanism must be canceled »

The invention has the object of providing a film cassette @lne to create these receiving photographic camera, -SO formed slnd _s that Fertl ^ ungstoleranzen at the front cassette part XWA of the assembled cassette no influence on the sweep d "ts filmstrip in the focal plane of

The task is based on a film cassette and a S ^ Si ^ hlsQhmi camera of the types mentioned above .

i » Mles & ung the * optical axis measured distance to the pressure

t $ M © fa® füiäMes ^ eies ®lß® wste «% sfei @ i? f2aisfae is developed and that © Kl umw Iirü®sm J # .4ep ®mtm% JuetlepflSehe der. Filmkasstfcts a, ü »elie 5? M®tl @ i? Fiä © lie g ^ gecffdsiiefc l®t, which is at a certain distance from the lens system, which is measured in g (i © F © pfeisefcera l-sliat

w @ s "Xl @ g" nd # invention greatly reduces the problems associated with the above cassettes, whereby it increases the importance of the precaution in "loh closed cassettes ^ MlHiFeM at the same time the ratio of the dimensions of the two cassette parts to each other" This is achieved by taking the critical cassette <m-

009852/0945

BADQRfGINAL

-V-

& e, di © engages with the camera the rear of the cassette part, which also the film contact surface "forms. The assembled cassette parts form the film without the camera pressure is applied to the film. That is why the much larger tolerances are required to achieve the exposing film section in contact with the film pressure surface hold up, allowed.

The invention is explained in detail with reference to the detailed description of the preferred embodiments which follows explained ..

In the description, reference is made to the accompanying drawing taken. Show it:

1 is an exploded perspective view of a first embodiment of the loaded film cassette according to the invention;

FIG. 2 is an enlarged elevational view of that shown in FIG

loaded film cassette, with part of the film and of his Sohutzpapler removed in the image window of the same was j

FIg, 5 - «In® pesap-akfelvi.ueh» Paid for a · ¹ first camera and the BATH ORIGINAL

Flg. 4 shows an enlarged, broken-off cross-section through the film cassette inserted in the camera along the line 4-4 in Fig. 3s · '- · ·

5 shows a view of a second exemplary embodiment of the film cassette according to the invention with an inserted film α in an exploded arrangement;

Fig. 6 to 8 the Flg. 2 to 4 of the first exemplary embodiment, further views of the second exemplary embodiment according to FIG. 5 and a second camera

Since photographic cameras and film cassettes are known as such, the present description deals in particular with elements that form part of the present invention or are more directly related to it, with camera and cassette parts not described in the present description and drawings part. gs & eigt siinid, belong to the state of the art _o

Like Flg. 1 shows, the first embodiment of the film cassette according to the invention comprises a front cassette part 11, a rear cassette part 12, a film take-up reel 13, a paper strip Ik attached to this and serving as a light protection, and a photographic film strip 15, which is behind with the paper strip 14. The cassette parts 11, 12 and the * reel 13 a rind vwattgsweisii made of molded plastic iU.t-3 tu ü3P - ,: a.ii: fiinöHK, tbaiit # n li-Ä-iaett * were the film- ·

HDOiMMM.

1737329

sfeE »®if © 3 15 and« Ser fapleFEfcpe & fen 14 sunäehet in. si-gfe 'asu eißesf 71lBW © 2 ^ ®tesoli ©. 16 rolled out, the In ötoes? Movie

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p will. This © VHtehe. 22 9.tsto _t as Srs Fi ^ ^l > 6 * ° ^, - -oreli des litiiegen'von Auf3.ag0flachen 23 dea. ve-fföere ^ K ~ agr "f,«> ifcei! g

009852/0945

at corresponding sections of the essentially concentric and parallel to the strip pressing surface 21 arranged opposite surface 24 of the rear cassette part 12 at a defined distance from the strip pressing surface 21, the approximately the strength of film strelfen 15 plus paper strelfen is equivalent to. The abutment is achieved by the two Cassette parts 11, 12 glued or otherwise joined together along the associated palms 25 and 26, respectively will.

Fig. 3 shows that a camera provided for receiving the film cassette according to the invention consists of a main housing 27 which is provided with a central, box-shaped camera part 28 arranged between two chambers 29 and 31, the chambers 29, 31 serving the Filmvorrats- and Filmaufwickelkammern 17 and 19 of the cassette loosely accommodate ₀ on the side remote from the camera front side of the camera Talles 28 is provided and Vin circumferential rearwardly projecting edge 32 1st formed so that the edge 32 of a corresponding, the Beliehtwjigsöffnung 18 of the cassette - See Fig. 2 - surrounding groove 33 can be received ₀ Through the interaction of the edge 32 and the groove 33 a light-tight, labyrinth-like connection is formed between the two parts, so that of the two camera parts 27 »26 only the box-shaped camera part 28 is opaque needed

009852/0945

; Av: -; SifcC 0% ΰ ■ BAD ORIGINAL

So that the cassette with the film strip 15 lies behind its exposure opening 18 representing a picture window in the focal plane® of the objective 3§ on the front of the camera part 28 EU, the construction according to US Pat Hat 33 and the end face 36 of the edge 32 as interacting support surfaces of the cassette or the camera, these two surfaces being held together by leaf springs 37 attached to the inside of a camera back cover 39, which are connected to associated runners BM d @? Back side © öez »Cassette come into contact when the rear cover-.39-of-the-camera-is-closed · '

As mentioned earlier & te & n, there is no need dutfeh the present egg? Firidimg _9, the s @ hr critical Abatandsverhäitnls between the xmva®i? ®n and rüeltwärfeigen cassette part strictly observed. Although © s is not absolutely necessary ₉ the front cassette & eii 11 can also be provided with a frame surrounding the exposure opening 18 and the groove 33 and the edge 32 cooperating with this can be used to provide a light-sealing between the cassette and camera part 28 Funds to be provided. Even if the exposure opening 18 and the light-facing groove formed in the front cassette part 11 are retained, the cassette is held so that the end face jS6 of the tape 32 is surrounded by the bottom surface 35 »of the groove 33 and other surfaces formed by the front cassette part 11 Spaced 1st. As can be seen very clearly from FIGS. 3 and 4, this is shown in the exemplary embodiment.

5 2/0 9 A 5. · BUILDING ORIGINAL

- ίο -

achieved by the fact that the edge 32 is provided with rearwardly extending projections 41 which are arranged axially symmetrically on opposite sides of the optical axis of the objective 34 and which are directed rearward on their end faces Form support surfaces 42, which are in a predetermined Distance sum lens 34 are located. When inserting the cassette

^ these projections 41 penetrate into the camera at the edge 32 th through matching openings 43, which are made in the front cassette part 11 along the groove 33, and get into Contact with forward facing mating surfaces 44 thereof Total area used to form the forward-facing Area 24 is used. Therefore, the correct position of the two cassette parts 11, 12 to one another, which is determined by the contact of the support surface 23 and the counter surface 24, is required is to be guaranteed only within relatively large tolerances, dl @ are limited by the condition that

™ the film strip 15 and the paper strip 14 in attachment of the strip edge surface 21 are held, with from An internal friction constant is established by the manufacturer, which applies when the film strip is transported into the film receiving chamber 19. Hence there is a change in the spring force the leaf springs 37 do not impair this function

The exact location of the strip edge surface 21 with respect to the The camera lens 34 is inserted directly through the fitting surfaces 44 set on the rear camera part 12, which by the

i ^ iia ^ O JJ ^{9852 / 0S45} BAD ORJGlNAU

- ii.-

Leaf springs 37 are held in such a way that they rest against the support surfaces 42 of the cassette part 28. The correct position of the barrel surfaces 44 on the strip pressure surface 21 is therefore a very critical point from the position of the various surfaces of the ice frame formed by the cassette; due to the Satsache that the surfaces 21 and 42 to each other in their immediate Läge v @ m the same cassette portion 12 are formed, which properly © Lag® can be practically ensured within very small tolerances _":

That in Pig. 5 to 8a shown second / & u @ Führungsk @ lsplel. of a cassette according to the invention and a camera shows that the same result is achieved if the projections 41 of the first embodiment example serving as guide noses on the cassette instead of on the j? Camera can be molded. In this two · * th AusfährungsbeispieX those who ropes ₈ parts d @ s In FIGS _c 1 to 4 dai made - AUEF-üferissagsbeispiels - ent "or speak the same function have @ n _p same reference number, jeair · They α ^ ur Usiter @@ h @ idung with a dash.

According to this exemplary embodiment, the The guide example did not use margin 32 on camera 28 * to be changed. The rear cassette part 12 * is equipped with a number of protrusions 4l * directed towards vöme, which forward-facing mating surfaces 44 * lying in one plane, which are in a predetermined, parallel position to the strip edge back surface 21 * isindo If further a

009852/0945

44 »lie ©» © tw & s in front of d®i ° B @ d <§Kif lache 35 ° of the groove 33 * »if the cassette. susansa @ isg © adds eats "W @ therefore nn the cartridge in the camera is inserted and * is pressed by leaf springs 37 * in the direction of the lens 34, di © come VCMT directed Paßflachen 44 ^f with support surfaces 42 'into contact with _a the for Front surface JS * of the edge 32 * on the camera part 28 ^β belong. The edge 32 ^{β engages in the groove 33 s} © in, © to © J © d @ c3 & d © s> @n BodexsÜäoh® 35 to perform a light-sealing function ° ^ u touch «»

The right Xcag @ d @ r Belichtungsöffnmng 18 ° sum lens 34 * depends therefore me won d @ r position of Paßfiä @ h @ n 44 ^e to the strip * bearing surface 2V Umä of him @ n associated ^ along the rear end face 3β "of Eandeg 32 ^δ located support surface 42 sum lens from _o 0m di @ danger of a @ s deformi ^ rens

The leaf springs 37 ^δ inflate on a

Make sure that the runners 36 'from the spring force b®aufß @ fel®gfe © n Andrttskkufen 36' preferably flow directly in the direction of the optical joint with the projections' 4I ¹ . The Voi'sp ^ üßge 41 'should preferably * fit * loosely into the corresponding openings 43 to prevent deformation of the cassette parts © Ii, 12 © & © ϊ? Avoid changing the position of the two cassette parts 11, 12 relative to one another, determined by the support surfaces 23 "and the insert surfaces 24 *. But even then, there is still the likelihood of light falling through the openings 43 ⁹ into the cassette ® reduced »

009852/0945

6AD ORIGINAL

if you see the projections 4l ⁹ in the openings * I3 ⁹ . To further prevent such a collapse, it is necessary to provide additional loan disks, for example (not shown) in that _a rib is attached to the cassette part 12 on the lower section of each projection, which is of a corresponding one in which the respective sealed opening surrounding portion 11 is received ^e ausgebildeten'Hut '·

From the above description it can be seen that the invention with simple means a grease simplification in the production obtained from film cassettes of the type described without the because of any existing advantage to be sifted nuA, whereby at the same time the manufacturing costs are reduced and the Cassettes with smaller tolerances in terms of dimensions can be made as it has been possible in mass production using the previously known cassette construction were.

bad original

Claims (1)

P a t β η t a η β ρ r O ο b β: 1. Film cassette for a photographic camera with one rear cassette part, which has a pressure surface for the Has a film strip, and old a front cassette _Ä part, the 1st provided with a Belichtungeöffnung, characterized _r that the rear cassette part (12, 12 ') in a certain, in direetion the optical axis measured distance sur contact pressure? Laugh (2I ₉ 21 *) at least one gauging surface (44, 44 «) trained 1st. 2. Photographic camera »Into the film cassette according to SA Claim 1 can be inserted with a lens system characterized in that each adjustment surface (44, 44 ») of the associated film cassette is a second adjustment surface (42, 42 ^C ) /, the P in a given, measured in the direction of the optical axis Distance to the lens system (34, 34 *) arranged 1st * 3ο film cassette according to claim I ₉ characterized in that the first adjustment preferably lying in one plane » surfaces (44, 44 ″) are arranged around the pressure surface (2I ₉ 21 ·). 'ί 4. Photographic camera according to claim 2, in dl «the ■ "" i Cassette according to claim 3 insertable 1st, daduroti seicenn- »Eiohntt that the second adjustment flfiohan (42, 42») in one Lie level ». '_ jpmmmu mi ⁸ ® ^2/09 ^ ^δ bad original 5. Film cassette according to claim 3, characterized in that that the first Jvetler surface W) in itself against the front = page / of the * film cassette extending dislocation (41 ·) of the rear » wärtigen lassettentfill »<12 '.) are formed · βο film cassette according to claim 5, characterized in that the offsets (4i ^e ) are formed like the reverse cassette part CiS ³ ). ο PhQt © gr & phiss @ he camera according to claim H, characterized in that the second adjustment surfaces (42) per se against the Camera ^ üekseite extending projections (Ml) formed are. . ^; 8. Photog? Aphls @ he camera according to claim 4 "in which the film" Cassette according to claim 5 or β can be inserted, characterized in that one of the second adjustment surfaces forming, preferably circumferential edge (32 °) is provided is. 9. Photographic camera according to claim 7 "in which the film" cassette according to claim 3 can be inserted, characterized in that the projections ( HI) are molded onto a preferably circumferential edge (32). 10. Film cassette according to one of claims 3, 5 or 6, characterized in that on the outside of the back 009852/0945 ' ⁵ "" ^Λ "BAD ORIGINAL wärtigen "cassette part © ® (12, 12 ⁹ ) are provided at least when the cassette is inserted with <£ ®n protrusions (4i, 4i ^s ) in the direction of the optical axis fluehfeende chuck (38 ₈ 38 ⁹ ). 11 · photographer! © eh © camera smeh © isatin d @ r claims k ^ ? or 8, in which the film cassette according to Apspfnch 10 is inserted, * thereby s @ k @ nnn8eiehnet, because & on the inside of a handle C39, 39 ^ß ) on the buffers (38, 33 ⁸ 5 attacking® feder «elastic Links (3I ₁ 3Τ ^Φ ) are provided » 12, film cassette according to one of claims 5, 6 or 10 for use in the photographic camera according to claim 8 or, respectively, Ii, characterized in that “dafi in the front cassette part CH ₃ , Ii ¹ ') a. Around the exposure opening (18, 18 ») circumferential groove (33, 33 ') is provided for receiving the edge (32, 32 · 3 on the camera and the bottom surface (35, 35 ⁹ ) of the groove (33, 33') has openings W ₉ ^f i3 ⁹ ) has for the passage of the projections (11, W) » 13e photographic camera sm @ h one of the claims 2 »* l _a 7, 8, 9 or 11, characterized in that, when the film cassette © is inserted, the first and other adjustment surfaces (W ₈ HH ^v * _t k2 _t 42 ⁹ ) / 8wl8Ohen the contact surface (21, 21 ") and the lens OH ₉ 3 *! ^C ) defining surfaces are» 009 852/0 9 A5 BATH Le e r. page