FR2563020A1 - Resistanceless rotation of a roller in a liquid, applicable principally to machines for treating emulsions in photography and cinematography - Google Patents
Resistanceless rotation of a roller in a liquid, applicable principally to machines for treating emulsions in photography and cinematography Download PDFInfo
- Publication number
- FR2563020A1 FR2563020A1 FR8406027A FR8406027A FR2563020A1 FR 2563020 A1 FR2563020 A1 FR 2563020A1 FR 8406027 A FR8406027 A FR 8406027A FR 8406027 A FR8406027 A FR 8406027A FR 2563020 A1 FR2563020 A1 FR 2563020A1
- Authority
- FR
- France
- Prior art keywords
- roller
- liquid
- weight
- rotation
- machines
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
- G03D3/00—Liquid processing apparatus involving immersion; Washing apparatus involving immersion
- G03D3/08—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material
- G03D3/13—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material for long films or prints in the shape of strips, e.g. fed by roller assembly
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photographic Processing Devices Using Wet Methods (AREA)
Abstract
Description
L'invention concerne, notamment dans le domaine photographique et cinématographique, l'élimination de la résistance à la rotation des rouleaux libres dans le bain au passage du film ou du papier sur ceux-ci. The invention relates, in particular in the photographic and cinematographic field, the elimination of the resistance to rotation of the free rollers in the bath when the film or paper passes over them.
Antérieurement, la résistance de rotation était due au poids du rouleau dans son liquide, pour un rouleau plein, ou à la poussée du liquide sur celui-ci (Principe d'Archimèdej, pour un rouleau creux et fermé. Previously, the rotational resistance was due to the weight of the roller in its liquid, for a full roller, or to the thrust of the liquid on it (Archimedes principle, for a hollow and closed roller.
L'élimination de ces résistances consiste à équilibrer le poids d'un rouleau creux et étanche, par rapport au poids du volume de liquide équivalent. The elimination of these resistances consists in balancing the weight of a hollow and sealed roller, with respect to the weight of the equivalent volume of liquid.
En remplissant ce rouleau creux avec un liquide quelconque de lestage jusqu'à sa limite d'immersion ou de flottaison, l'équilibre de poids est obtenu. By filling this hollow roller with any ballasting liquid up to its immersion or flotation limit, the weight balance is obtained.
L'effet recherché s'obtient également en plaçant un poids de lestage sur l'axe du rouleau creux, et en son centre de gravité. Ce poids doit être égal à la différence poids du rouleau - poids du liquide correspondant au volume du rouleau. Ce poids de lestage a en plus l'avantage d'équilibrer le rouleau longitudinalement et de nue pas se déplacer comme le liquide de lestage. The desired effect is also obtained by placing a ballast weight on the axis of the hollow roller, and in its center of gravity. This weight must be equal to the difference between the weight of the roller and the weight of the liquid corresponding to the volume of the roller. This ballast weight has the additional advantage of balancing the roller longitudinally and of not moving like the ballast liquid.
La densité du rouleau est alors la même que celle du volume de liquide égal à celui-ci. Ainsi, le rouleau est entre deux eaux, par annulation de la poussée du liquide (Principe d'Archimède) et l'annulation de son propre poids, de densité supérieure au liquide pour un rouleau plein. The density of the roller is then the same as that of the volume of liquid equal to it. Thus, the roller is between two waters, by canceling the thrust of the liquid (Archimedes' Principle) and canceling its own weight, of density greater than the liquid for a full roll.
La résistance à la rotation s'en trouve considérablement réduite. The resistance to rotation is considerably reduced.
La figure 1 montre le rouleau plein. D'une densité (D) supérieure au liquide, il coule et oppose une force à la rotation (R). Figure 1 shows the roller full. With a density (D) greater than the liquid, it flows and opposes a force to rotation (R).
La figure 2 montre le rouleau creux. I1 flotte et la poussée (P) du liquide oppose une force à sa rotation (R). Figure 2 shows the hollow roller. I1 floats and the thrust (P) of the liquid opposes a force to its rotation (R).
La figure 3 montre que le poids du rouleau est égal à son équivalent de volume du liquide, par remplissage du rouleau avec un liquide de lestage (L). Les rapports de force de poids du rouleau et de poussée du liquide sont annulés. La rotation du rouleau (R) est donc moins dure. FIG. 3 shows that the weight of the roller is equal to its equivalent volume of the liquid, by filling the roller with a ballasting liquid (L). The weight ratios of the roller and the thrust of the liquid are canceled. The rotation of the roller (R) is therefore less hard.
La figure 4 montre que cet équilibrage s'obtient en plaçant au centre axial du rouleau un poids (K) égal à la différence du poids du rouleau et du poids de liquide correspondant à son volume. Les rapports de force de poids du rouleau et poussée du liquide sont annulés. La rotation du rouleau (R) est donc moins dure. FIG. 4 shows that this balancing is obtained by placing a weight (K) in the axial center of the roller equal to the difference between the weight of the roller and the weight of liquid corresponding to its volume. The weight ratios of the roller and thrust of the liquid are canceled. The rotation of the roller (R) is therefore less hard.
La figure 5 montre que ce poids placé au centre longitudinal équilibre également le rouleau dans sa longueur. Figure 5 shows that this weight placed in the longitudinal center also balances the roller in its length.
Dans le domaine des machines de développement, les émulsions sensibles des films et papiers (E) sont en contact avec la surface des rouleaux libres dans les bains (Fig. 3). In the field of development machines, the sensitive emulsions of films and papers (E) are in contact with the surface of the free rollers in the baths (Fig. 3).
La résistance de rotation des rouleaux libres entraîne des risques de glissement du film ou papier sur ceux-ci, d'où la possibilité de rayures. The rotational resistance of the free rollers leads to the risk of slipping of the film or paper thereon, hence the possibility of scratches.
L'élimination de résistance à la rotation diminue considérablement ces risques, surtout pour des machines de grandes largeurs, permettant également le passage de bandes de faibles largeurs. The elimination of resistance to rotation considerably reduces these risks, especially for machines with large widths, also allowing the passage of strips of small widths.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8406027A FR2563020B1 (en) | 1984-04-13 | 1984-04-13 | ROTATION WITHOUT RESISTANCE OF A ROLLER IN A LIQUID, APPLICABLE MAINLY TO THE MACHINES OF TREATMENT OF THE EMULSIONS IN THE FIELD PHOTOGRAPHIC AND CINEMATOGRAPHIC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8406027A FR2563020B1 (en) | 1984-04-13 | 1984-04-13 | ROTATION WITHOUT RESISTANCE OF A ROLLER IN A LIQUID, APPLICABLE MAINLY TO THE MACHINES OF TREATMENT OF THE EMULSIONS IN THE FIELD PHOTOGRAPHIC AND CINEMATOGRAPHIC |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2563020A1 true FR2563020A1 (en) | 1985-10-18 |
| FR2563020B1 FR2563020B1 (en) | 1986-08-14 |
Family
ID=9303214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8406027A Expired FR2563020B1 (en) | 1984-04-13 | 1984-04-13 | ROTATION WITHOUT RESISTANCE OF A ROLLER IN A LIQUID, APPLICABLE MAINLY TO THE MACHINES OF TREATMENT OF THE EMULSIONS IN THE FIELD PHOTOGRAPHIC AND CINEMATOGRAPHIC |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2563020B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB904149A (en) * | 1959-09-03 | 1962-08-22 | Langham Thompson Ltd J | Improvements in or relating to photographic processing |
| DE2414824A1 (en) * | 1973-03-28 | 1974-10-10 | Crosfield Electronics Ltd | BOW HANDLING DEVICE |
| US4003070A (en) * | 1974-04-04 | 1977-01-11 | Merz & Co. | Apparatus for treating photographic materials |
| EP0078769A1 (en) * | 1981-11-04 | 1983-05-11 | Ciba-Geigy Ag | Processing device for sheetlike or weblike, especially photographic material |
-
1984
- 1984-04-13 FR FR8406027A patent/FR2563020B1/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB904149A (en) * | 1959-09-03 | 1962-08-22 | Langham Thompson Ltd J | Improvements in or relating to photographic processing |
| DE2414824A1 (en) * | 1973-03-28 | 1974-10-10 | Crosfield Electronics Ltd | BOW HANDLING DEVICE |
| US4003070A (en) * | 1974-04-04 | 1977-01-11 | Merz & Co. | Apparatus for treating photographic materials |
| EP0078769A1 (en) * | 1981-11-04 | 1983-05-11 | Ciba-Geigy Ag | Processing device for sheetlike or weblike, especially photographic material |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2563020B1 (en) | 1986-08-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |