DE1300023B - Transport roller arrangement for photographic strip-shaped material - Google Patents

Description

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The invention relates to a transport roller gap remains with this known arrangement

Order for photographic strip-shaped mate material still in contact over a certain distance

rial, with grooves in the roll surface with which the material is detached from the

can be seen in the belts which cause the roller surface to support the separation. This

of the transported moist material from the upper 5 can under certain circumstances lead to streaking or

lead surface of the transport rollers over the outer surface of another impairment. aside from that

the rollers protruding inserts made of elastic, this known arrangement is very expensive,

intervene resilient material, which at Beruh- The object underlying the invention is

tion with a counter roller completely in its grooves is a transport roller arrangement of the

are pushable. io gangs mentioned genus, with the without

It is often desirable to have additional photographic downstream facilities secure

Treat material quickly, especially on me- peeling of the material from the roll surface

medical area, for example in hospitals behind the nip is guaranteed.

sern where x-ray images are developed quickly and to solve this problem, the invention provides

Must be treated to get a quick diagnosis 15 that the insoles are over on their inner circumference

to be able to provide. Even in lithography, the entire length of the grooves on the bottom is fed up

advertising and for photo reports is a quick application, on its entire outer circumference radial

Treatment of the photographic material required protrude from the surface of the roller and a

borrowed, in order to have the photographs as quickly as possible - width less than the width of the groove,

to be able to deliver. ao Due to the training according to the invention, it is in

At the high speeds with which this is advantageously possible with the insoles

photographic material the rollers of a transport roller provided in this way at any point of the

through the treatment device, the treatment device is to be arranged as it is

the problem that the material meets the respective requirements after passing. At the well-known

Contact zone of two transport rollers on the 25 th transport roller arrangement with additional

Surface one of them sticks. This option is already a belt and pulley

there is no slight adhesion of the photographic material, since a considerable amount of space is required here.

on a roller can lead to the fact that the material is borrowed. In the training according to the invention

bulges or from its prescribed path can, on the other hand, be provided with the insoles.

deviates, so that to eliminate the disturbance a 30 NEN transport rollers at any point against smooth

Stopping the treatment device required rollers to be replaced without a change

is. This not only results in a cost-increasing approach to the treatment facility,

fall time for the device, it can also be the photo- In addition, in the training according to the invention

graphic material may be damaged in the process. damage or impairment of the

In a known transport roller arrangement 35 material and an additional noise generation versind avoided in circular grooves of the transport roller.

Rigid, intransigent material rings inserted, In one embodiment it is provided that the

the inserts form closed rings with a larger inner and outer diameter. At two

than have the circular groove in which they are inserted. cooperating rollers can make the rings

As a result, the rings occur when they are in on a 40 receiving grooves on the two rollers

Place of the roller carrying them with the counter roller are offset against each other in a known manner.

or another counter surface in contact.

Another embodiment is designed in such a way that, on the opposite side, the grooves are helical in the circumference of the far out of the grooves. The rigidity of these rings run 45 roller and the deposits the shape of a causes a strong noise and can have a talking screw thread. In this case, in violation of the photographic material, the conveyed material will, in particular, lead over the particularly sensitive emulsion layer. peeled off the entire length of the roller.
In addition, the lifting effect on the material can be provided that two helically straight at the point where it is desired, namely 50 shaped, wound grooves with opposite one another immediately behind the contact zone of the transport slope are arranged in the circumference of the roller, rolling, low . The inserts can be made of polyurethane foam

In another known arrangement, they are to be provided.

Transport rollers provided with circumferential grooves, in the training according to the invention are at Engage belts, which over from the transport 55 touch a transport roller with its counter rollers Rie- roller arranged axially parallel at a distance, the inserts together at the contact zone human disks 6 are guided, which are mounted on axles and pressed into their grooves with the effect, are. In this known arrangement, this is achieved by the fact that they are then after passing this zone The material passing through the nip is expanded again and over the circumference of the roll Roll surface through the tangential outgrowth of the 60. This is what is transported Transport rollers remove sections of the strip photographic material when it is men lifted, which should adhere to the roller surface as a downstream guide, immediately serve for the material. The belts are of the roller embodiment in a downstream of the roller contact zone this known arrangement lifted in the surface.

Arranged in such a way that they are slightly out of order

The catch surface of the rollers protrudes in order to be fully explained on the basis of the drawing; in this shows

to form a waterproof seal on the nip. Fi g. 1 is a perspective view of the transport

After the material has passed through the roller assembly of a dryer of a film hand-

3 4

treatment device, in which parts of the drying rollers are pressed, the radial thickness of the ring is greater than

broken away, the depth of the groove 24. The width of the ring 26, the

F i g. 2 shows a longitudinal section along line 2-2, which is designated by w , is slightly smaller than the width

Fig. 1, the annular recess 24, so that the

F i g. 3 is a perspective view of an embodiment ring being easily pressed into the groove

Approximate shape of the transport roller arrangement according to the can and from this compressed state

Invention in which parts have broken away, can expand freely again.

F i g. 4 shows an enlarged partial section along the line. The rings 26 are both on the rollers 18 as

4-4 of Fig. 3 by the inlay of the groove one also on the rollers 14 in the longitudinal direction in the Aboberen Transport roller, io stood apart from each other. However, the arrangement

F i g. 5 is an enlarged section along line 5-5 voltage taken so that the rings of the lower

the F i g. 3 by inserting the groove of a lower roller 14 always between the rings 26 of the upper one

Transport roller, roller 18 lie, d. i.e., the rings 26 of the roller 14

F i g. 6 shows a section along line 6-6 in FIG. 4, are offset from those of the roller 18

F i g. 7 is a perspective view of one of a 15 net. The rings 26 are also in the roller 14 in the off-roller removed ring and recesses 24 arranged. In the areas of

F i g. 8 is a perspective broken away device in which there is no fear of the film sticking

If a transport roller is shown in another aspect, no rollers with rings are used. here

embodiment of the invention. the rollers can have a smooth surface.

The drawing shows the formation of the transport 20 The film F, as a strip or in individual

rolling in connection with the dryer 10 of a sheet can be present, emerges after washing

photographic film handling device. the treatment part P and is between the

The dryer 10 has the transport roller arrangement rollers of the device 12 of the dryer 10,

tion 12, which has a number of lower rollers 14 hot air tubes 32 and 36 with down and up, respectively

contains, which with oppositely arranged 25 projecting slots 34, 38 blow warm air from above

upper rollers 18 cooperate. The distance and down against the film to dry it, while-

roller pairs 14 and 18 lying apart from one another form rend it is moved past the slots,

taken together a continuous path for the FiImF runs between the roller pairs in

the photographic film material that is drying in the direction of the arrows through. In the areas of contact

passes between the rollers. 30 of the rollers 18 and 14, the yieldable

Each roller 14, 18 has a roller body 20 made of compressible and elastic material of the ring a material that has a hard and durable top layer 26 together over a diameter forms, and is mounted on a shaft 22. pressed, which is substantially the depth of the grooves 24

The shaft 22 carries a gear 21 at one end, corresponding to R in FIGS. 3 and 4 shown,

35 The ring 26 assumes a somewhat eccentric shape with a screw

drive system is engaged. On the other hand shape because it is along the line of contact between

the shaft 22 sits another gear 23, which is pressed flat against the film and the rollers and on

is in engagement with a gear 25 and thereby approximately maintains its shape or the other places

the roller 14 drives. stretches a little. The dimension α denotes the thickness

The roller 18 is provided with a stub shaft 23 '40 of the ring 26 in the expanded state (FIG. 6), while

see which rims into a warehouse in the dryer 10. The rend with b the thickness at the line of contact with the

Roller 14 has journals 25 'and 27' which support film, i. H. denotes the greatest compression

is also in bearings (not shown) in the dryer.

10 are stored. Because of its elastic properties, the

In the case of the upper roller 18, ring 26 strives in its surface 45 to expand again immediately and one or more circular recesses to emerge from the recess 24 when it leaves the grooves 24 provided in the deposits in the form of the contact zone of the two rollers. The rings 26 made of a soft, resilient radially outward expansion of the ring material, which is compressible, are inserted. 26 is shown in FIG. 4 at point E by small arrows. Each ring 26 can additionally be indicated 5 ° in its recess. In some cases, depending on the film means of a suitable adhesive attached, emulsion and film type, the film that is applied to the bottom 28 of the recess tends to adhere to the roller 18 and, as is in FIG. F i g. 4 shown in dashed lines at F, upwards

The ring 26 is preferably to be curved with a plane. However, if the ring 26 through his

Outer surface 30 is provided and consists of a 55 elasticity from the recess 24 of the roller 18

Resilient material, which, essentially unresponsive, emerges upwards again, becomes the film

sensitive to chemical decomposition, such as being pushed off the roller and prevented from taking place

Has elasticity that after deformation it quickly sticks to it and deviates from the intended path.

returns to its normal shape. One has to give way.

found that polyurethane foam meets these requirements

struggled fulfilled. lying rings 26 of the lower rollers 14 stretch

The inner diameter of the ring 26, which is approximately at point G with χ and prevent the

is indicated, corresponds essentially to the through-film adhered to the lower roller and, as in FIG

knife of the bottom of the recess 24, while the F i g. 5 shown in dashed lines at F, downwards

The outer diameter marked with y is greater than 65 curves. In short, the rings 26 graze the

the outer diameter of the roller body, so that film off.

a part of the ring in the manner of a circular ring was about with the described formation of the rollers

the surface of the roller protrudes. Different from- it is possible to use film material with a thickness of less

than 0.1 mm with no or almost no adhesion by means of the To transport rollers without being distracted from his prescribed path. Another The advantage of the described design of the roller is that the film is transported further without this creates marks or scratches on the film.

In Fig. 8, another embodiment of the invention is illustrated in which a roller 42 is on its surface is provided with a recess 44 which is helical over the entire length of the Roller passes around. In this recess is an elongated, resiliently compressible strip-shaped Insert 46 attached. The thickness of the part 46 is again greater than the depth of the recess 44, see above that a part of the insert 46 protrudes from the surface of the roller 42 over its entire length. the The width of the compressible liner 46 is slightly less than the width of the recess 44, so that they easily disappear into the recess when they are compressed, when leaving the nip emerge freely from this upwards again and so can exert the effect according to the invention on the film material.

The roller 42 may be provided with a second elongated recess 48, which is also on the the entire length of the roller extends and is helical in the opposite direction with respect to the recess 44 is tortuous. In the recess 48 is also an elongated, resiliently compressible insert 50 is used, which corresponds to part 46 and acts in the same way.

Claims (6)

Patent claims: 1. Transport roller arrangement for photographic strip-shaped material, in which in the Roll surface grooves are provided in which to support the detachment of the transported moist material from the surface of the transport rollers over the surface of the rollers protruding inserts made of resilient material engage, which when touched can be pressed completely into their grooves with a counter roller, characterized in that that the inserts (2) lie snugly on their inner circumference over the entire length of the grooves on their bottom, on their entire The outer circumference protrudes radially from the outer surface of the roller and has a smaller width than that Have groove width. 2. Arrangement according to claim 1, wherein the grooves in the roller are annular, thereby characterized in that the deposits form closed rings (26). 3. Arrangement according to claim 2, characterized in that that in the case of two co-operating rollers, the grooves (24) receiving the rings (26) on the two rollers are known per se Way are arranged offset from one another. 4. Arrangement according to claim 1, characterized in that the grooves (44, 48) are helical extend in the circumference of the roller (42) and the inserts (46) have the shape of a corresponding one Have screw thread. 5. Arrangement according to claim 4, characterized in that two helically wound Grooves (44 and 48) arranged with opposite pitch in the circumference of the roller are. 6. Arrangement according to one of the preceding claims, characterized in that the deposits are made of polyurethane foam. 1 sheet of drawings