DE2951367C2 - Holding and guiding device for a microfiche on a microfilm reader - Google Patents

Description

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As a rule, the user has several microfiche holders 7, which he places within reach on the reader or in the vicinity of the reader. A microfiche is inserted in each of the microfiche holders. The number of microfiches holders should be at least the same as the number of microfiches that are frequently used. If a microfiche holder is now to be inserted into the reader, the user first pulls the carrier plate 4 towards him in the direction of the arrow A until the detent spring 17 engages in the detent 18. The carrier plate 4 is now in its outermost stop position, in which it is most convenient to replace the microfiche holder.

Now the user grabs the desired microfiche holder and pushes it, as shown in FIG. 2, the device is shown, the rear edge of the microfiche holder sliding along the top of the carrier plate 4. As soon as the microfiche holder is raised by sliding it onto the support surface 6a , the lens 13 is also raised and thus rests on it resiliently

the microfiche house. Is the microfiche holder so I

because when pushed into the device, the! guide bar ■

5a and the guide groove 9 lie one above the other; o the guide strip 5a engages in the groove 9. The microfiche holder 7 is now in the functional position. By moving the microfiche holder in the plane defined by the directions A and B , each of the microimages of the microfiche 11 to be projected can be positioned in the projection beam path 19.

To remove the microfiche holder from the device, the microfiche holder only needs to be lifted slightly and pulled out of the device. As is clear from the above description, real one-hand operation is possible with the proposed device. Replacing the microfiche holder can be done extremely quickly and easily. When inserting the microfiche holder into the device, it is not necessary to pay attention to a specific insertion position, since the engagement between the guide bar 5a and guide groove 9 occurs at any point, as seen in the direction of arrow B.

For this purpose 2 sheets of drawings

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Claims (1)

Claim: Holding and guiding device for a microfiche on a microfilm reading device for moving the microfiche in two coordinate directions relative to an imaging lens with a carrier part mounted on the device housing such that it can be displaced in a first direction, which carries guide means on which an exchangeable microfiche holder in a second direction perpendicular to The microfiche holder has a flat plate, transparent at least in the area of the support surface for a microfiche, and a transparent cover for this, and guide means designed as a groove are provided on the underside of the plate, which interact positively with the guide means on the support part , wherein a single guide groove (S) is formed as a guide means on the underside of the plate (8). which engages over an opening formed on the carrier part (4) guide rail (5a) as a function of position of the plate (8), wherein on the carrier part (4) on the said guide means {5a) opposite side is mounted a support element (6), on which the the plate (8) in the functional position is supported with its rear side opposite the plate-side guide means (9), and the support element (6) has a run-up bevel (6a ¹ ) facing a plate (8) to be inserted, according to Patent 29 51 368, as by in that arranged on the support surface for a Mü.rofichi (11) position marks (12) and that the transparent cover secured by a at the i latte (8) along an edge (\ 0a) on the plate (8 ) or an inserted microfiche (11) adhesive film (10) is formed. The invention relates to a holding and guiding device for a microfiche on a microfilm reading device for moving the microfiche in two coordinate directions relative to an imaging lens with a support part mounted on the device housing such that it can be displaced in a first direction, which guide means carries, on which a replaceable microfiche holder in a second direction perpendicular to the first Direction is guided displaceably, the microfiche holder a flat, at least in the area of the support surface for a microfiche has a transparent plate and a transparent cover therefor, and wherein on the underside of the plate formed as a groove guide means are provided, which with the support part-side Guide means act together in a form-fitting manner, as guide means on the underside of the Plate a single guide groove is formed, which in the functional position of the plate one on the carrier part formed guide bar engages over, wherein on the carrier part on the opposite of the guide means Side a support element is attached, on which the plate in functional position is with her the plate-side guide means opposite, rear side supported, and wherein the support element has a run-up slope facing a plate to be inserted, according to patent 29 51 368. The invention is based on the object of the above-mentioned device according to the main patent to improve even further, so that they are even easier to use, but at the same time save space and is formed inexpensively in terms of manufacturing costs. This object is achieved according to the invention by the features of the main claim. The invention is explained in more detail with reference to drawings ίο Fig. 1 is a perspective view of the holding and Guide device on a microfiche reader, F i g. 2 shows a section through the holding and guiding device according to FIG. 1, with partially in operating position inserted microfiche holder. and F i g. 3 shows a section according to FIG. 2 with microfiche holder in operating position. In Fig. 1, the reference number 1 denotes the lower part of a microfilm reading device. On this device lower part, two parallel guide rails 2, 3 are attached, which carry a carrier plate 4, which is displaceable relative to the device lower part 1 in direction A. A bar 5, on which a guide bar 5a and stop bolts 5b are formed, is fastened to the front side of the carrier plate 4 facing the user. The rear part of the carrier plate 4 carries a support element 6, the side 6a of which facing the user is beveled; it forms an acute angle with the carrier plate 4. A detent spring 17 is fastened in the rail 2 and, in the front stop position of the carrier plate 4, engages in a detent recess 18 formed on the bar 5. A microfiche holder 7 comprises a transparent, rectangular plate 8, on the underside of which a groove 9 is formed parallel to the front edge facing the user. in the at the in F i g. The functional position of the microfiche holder shown in FIG. 1 engages the guide bar 5a so that the microfiche holder 7 is displaceable in the direction of arrow B relative to the carrier plate 4. On the rear side facing away from the user, the microfiche holder 7 rests on the upper end face 6b of the support element 6. On the top of the transparent plate 8 is a transparent plastic film 10 along its edge 10a attached, e.g. B. glued. A microfiche 11 is inserted between this film 10 and the transparent plate 8. The exact position of the microfiche 11 on the transparent plate 8 is indicated by corner markings 12 The transparent cover film 10, which is made, for example, of polyethylene or polyester 5C- isi. adheres due to adhesive forces, if necessary through an adhesive layer supported on the microfiche and on the transparent plate 8, so that the microfiche is held securely in its desired position within the corner markings 12. In the F i g. 2 and 3 is the imaging lens schematically 13 shown, which is mounted on a leaf spring 15 attached to the device housing 14 and, as shown in FIG 3 can be seen, resiliently on the microfiche holder 7 rests. If there is no microfiche age in the fio device of the reader is used, it depends Objective 13 compared to that shown in FIG. 3 posi = tion a little downwards, but between the The underside of the lens and the carrier plate 4 still leave a sufficiently large distance around the microfiche holder between the lens and the carrier plate. The procedure with the microfiche holder described above is now as follows: