Material web drier
First Claim
1. A material web drier containing a hood drier arrangement for controlling the gas flow of a drying medium applied to a material web which is to be dried, comprising:
- means coacting with said material web to be dried for infeeding a drying medium thereto;
said drying medium-infeed means containing discharge openings through which flows the drying medium for contact with the material web;
means for selectively completely freeing or partially or completely closing said discharge openings, in order to thereby selectively alter the impingement of the material web by the drying medium at discrete locations thereof, both in the lengthwise direction and also in the transverse direction of said material web; and
said means for selectively completely freeing or partially or completely closing said discharge openings being structured to enable controlled impingement of the material web by the drying medium at different intensities over the width of the material web without simultaneously altering the impingement intensity of the drying medium in the lengthwise direction of the material web.
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Accused Products
Abstract
A material web drier containing a device for controlling the gas flow of a drying medium as a function of the actual state of the wet material web which is to be dried, comprising nozzle casings or surfaces containing blow-out or discharge openings arranged in cooperating relationship with respect to the material web. The discharge openings are directed towards the material web and serve for blowing-out the drying medium onto the web. For the purpose of dosing the gas flow or stream effluxing at the nozzle casings or surfaces, there are provided opening and closing elements which free the discharge openings or partially or completely close the same, as desired, whereby it is possible to vary the impingement of the material web by the drying medium selectively at discrete locations or regions thereof, both in the lengthwise and transverse directions of such material web.
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Citations
19 Claims
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1. A material web drier containing a hood drier arrangement for controlling the gas flow of a drying medium applied to a material web which is to be dried, comprising:
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means coacting with said material web to be dried for infeeding a drying medium thereto; said drying medium-infeed means containing discharge openings through which flows the drying medium for contact with the material web; means for selectively completely freeing or partially or completely closing said discharge openings, in order to thereby selectively alter the impingement of the material web by the drying medium at discrete locations thereof, both in the lengthwise direction and also in the transverse direction of said material web; and said means for selectively completely freeing or partially or completely closing said discharge openings being structured to enable controlled impingement of the material web by the drying medium at different intensities over the width of the material web without simultaneously altering the impingement intensity of the drying medium in the lengthwise direction of the material web. - View Dependent Claims (2, 3)
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4. A material web drier for controlling the gas flow of a drying medium onto a material web which is to be dried, comprising:
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means coacting with the material web to be dried for the infeed of a drying medium thereto; means for supplying drying medium to said drying medium-infeed means; said drying medium-infeed means being provided with discharge openings through which flows the drying medium for contact with the material web; and opening and closing means cooperating with said discharge openings in order to selectively free or partially or completely close said discharge openings, in order to thereby selectively vary at predetermined locations of the material web, both in the lengthwise direction and in the transverse direction of said material web, the impingement of said material web by said drying medium. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A material web drier for controlling the gas flow of a drying medium onto a material web which is to be dried, comprising:
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means coacting with the material web to be dried for the infeed of a drying medium thereto; means for supplying drying medium to said drying medium-infeed means; said drying medium-infeed means being provided with discharge openings through which flows the drying medium for contact with the material web; opening and closing means cooperating with said discharge openings in order to selectively free or partially or completely close said discharge openings, in order to thereby selectively vary at predetermined locations of the material web, both in the lengthwise direction and in the transverse direction of said material web, the impingement of said material web by said drying medium; said opening and closing means comprising slide means; said slide means being displaceably arranged to coact with said discharge openings of said drying medium-infeed means; said slide means being provided with a repetitive row of bores capable of coacting with at least given ones of said discharge openings in order to change the flow of drying medium through said discharge openings depending upon the position of said slide means; a wall located opposite said discharge openings of said drying medium-infeed means; a slide shoe supported by spring force at said wall for pressing said slide means against said drying medium-infeed means; a rigid frame means for interconnecting said slide shoe and said slide means; adjustment means for selectively positionally adjusting said slide means; coupling means for connecting said slide means with said adjustment means; said coupling means engaging essentially at the center of gravity of said frame means; a rigid frame means for interconnecting said slide shoe and said slide means; adjustment means for selectively positionally adjusting said slide means; coupling means for connecting said slide means with said adjustment means; and said coupling means engaging essentially at the center of gravity of said frame means.
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Specification