DE2833968A1 - Plastics coated photographic paper passes through squeezer rolls - on movable supports giving easy maintenance access - Google Patents

Abstract

A drying appts. intended esp. for plastic-coated photographic papers, comprises a drying chamber and conveying system inside a common housing with two pairs of squeezer rolls at the inlet side. The squeezer rolls are arranged in two successive pairs. One roll of each pair is held in a common fixed support and the other roll of each pair in a common support which can be pivoted out or pulled out from the housing. One roll of each pair is motor-driven and is coupled by friction or other means with the opposite roll of the same pair.

Description

DEVAPPA Dr.Ing.Zinsser - Ing.K.Prestl, 8420 Kelheim

Drying device, especially for plastic-coated photographic papers

The invention relates to a drying device, in particular for plastic-coated photographic papers with a 'a drying chamber and a transport device for the housing containing the papers and two pairs of nip rollers assigned to the drying chamber on the inlet side,

It is known to take photo papers straight out of the baths in wet condition in the drying chamber of drying devices bring in. The photo papers are initially through Detected nip rollers that remove the water particles adhering to the photo paper and the photo paper into the Slide in the drying chamber. Attempts have been made to achieve the squeezing effect by arranging two pairs of squeezing rollers to enhance. The known devices have the disadvantage

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in common that the squeegees are cumbersome can be serviced and cleaned.

The invention has for its object while maintaining an improved Squeeze effect to make the squeegee rollers easily accessible.

According to the invention, this is achieved by pairs of squeezing rollers arranged one behind the other with axially parallel squeezing rollers, their nip rollers extending above and below the photographic paper web are held in common carriers are, of which one is fixed and the other foldable or pluggable on the housing and that a squeegee roller of each pair of rollers is rotatable by a motor and with the associated squeezing roller of the pair of rollers in the squeezing position is positively, non-positively or frictionally coupled. The carriers are expedient by means of strip parts or frames formed and the nip rollers of each pair of nip rollers coaxially with a pinion or the like. provided that in the crushed position mesh with each other and are connected to each other by a pinion. It is also provided that the carrier is in the squeezed position, e.g. to be fixed aligned with each other by centering pins. In this way, by a lifting or pivoting movement the nip rollers located on one side of the paper web

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to remove the two pairs of nip rollers together at the same time and the pairs of nip rollers are accessible for maintenance and cleaning purposes.

The invention is explained in the drawing on the basis of exemplary embodiments. Show it:

1 shows a device schematically in side view, partly in section,

2 shows a pair of squeeze rollers in a side view, enlarged, Fig. 3 shows a pair of nip rollers in a front view and

4 shows a pair of nip rollers in section along the line IV-IV of Fig. 3.

In FIG. 1, 1 denotes the box-shaped housing of the drying device, which has a drying chamber 3 for the photographic papers, which is influenced by a hot air blower. Upstream of the drying chamber 3 on the inlet side are two pairs of squeezing rollers 4 and 5, which together remove the water adhering to the wet photographic papers by means of a squeezing process and transport the photographic papers into the drying chamber 3. ^{The nip roller pairs} 4 and 5 are placed one behind the other and formed by axially parallel ^{nip rollers 4 f} , 4 lf and 5 ', 5 ^{11 , the nip rollers 4' and 5 f} provided below the photographic paper web by

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le 6 ^{and the nip rollers} 4 lf, 5 lf extending above the photographic paper ^{web are carried} by strip parts 8. The squeezing rollers 4 ', 4 ¹ * or 5 ¹ , 5 ¹¹ mesh with one another in the squeezing position via pinions 9, 9' and 10, 10 ', the pinions 9 and 10 being connected via an intermediate gear 15 and via a chain wheel 16 are rotatable with chain 17 by a drive device housed in housing 1. According to the invention the strip portions 6 and an otherwise support, eg, a frame, ', 5', recognizable set for the nip rolls 4 as shown in Fig. 2 on the housing 1 and the strip portions 8 with the nip rollers 4 ¹¹ and 5 ¹¹ by a hinge point 11 pivotally connected to the housing 1. In the pivoted position, the nip rollers 4 ¹ , 4 ^fl and 5 ¹ , 5 ^fl are away from each other and easily accessible for maintenance or cleaning. By pivoting the strip parts 8 connected, for example, by a rod 18, the squeezing rollers 4 ", 5 ^{11 can be brought} into the squeezing position and the pinions 9, 9 'and 10, 10' can be brought into operative connection with one another.

In the device of FIG. 4, the strip parts 6 are merum firmly connected to the housing 1 and the strip parts 8 pluggable with the strip parts 6 connectable. Centering pins 1% the strip parts 6, which are in centering holes 13 of the strip parts 8 intervene, create the prerequisite for an aligned assignment of the strip parts 6 and 8.

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It corresponds to the invention that the centering pins 12 are optionally also introduced into perforations in the housing 1 can be. Removable cover plates 14 are used to mechanically protect the nip rollers and protect the user.

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Claims (4)

2 E. ".in DEVAPPA Dr.Ing.Zinsser - Ing.K.Prestl, 8420 Kelheim Patent claims Drying device, in particular for plastic-coated photographic papers with a housing having a drying chamber and a transport device for the papers and two pairs of squeezing rollers assigned to the drying chamber on the inlet side, characterized by pairs of squeezing rollers (4 ¹ , 4 ^lf j 5 ¹ , 5 ¹¹ ) arranged one behind the other with axially parallel squeezing rollers (4 1, 4 lf j 5 1, 5 11) , 5), whose nip rollers (4 ¹ , 5 ¹ and 4 ¹ S 5 ¹¹ ) extending above and below the photographic paper web are held in common carriers (6, 8), one of which (6) is fixed and the other (8 ) is foldable or pluggable on the housing (1) and that a squeegee roller (4 ^f , 5 ¹ ) of each pair of rollers (4>. 5) is rotatable by motor and with the associated squeegee roller (4 ^fl > 5 ' ¹ ) of the roller pair is coupled positively, non-positively or frictionally in the squeezed position. 030007/0309 2. Drying device according to claim 1, characterized in that the nip ^{rollers (4 'and 4 lf} , or 5 ¹ and 5 ¹¹ ) of the roller pairs (4, 5) have coaxial pinions (9, 9', 10, 10 ') that mesh with each other in the squeezed position and are connected to each other by an intermediate gear. 3. Drying device according to one or both of the preceding Claims, characterized in that the carrier (6, 8) by centering pins (12) or the like. are fixed aligned to one another in the squeezed position. 4. Drying device according to one or more of the preceding claims, characterized in that the ^{nip rollers (4 1} , 4 ¹¹ »5'f 5 ¹¹ ) are held in strip parts (6, 8) serving as carriers or in frames. 030007/0309