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| Metal passivation for anode grade petroleum coke |
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| Bipolar battery cells, batteries and methods |
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| Process for preparing a membrane/electrode assembly |
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| Fuel cell structures |
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| Variable pressure passive regenerative fuel cell system |
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| Solid polymer fuel cell systems incorporating water removal at the anode |
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| Anode assembly for a variable pressure passive regenerative fuel cell system |
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| Quasi-passive variable pressure regenerative fuel cell system |
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| Hollow artery anode wick for passive variable pressure regenerative fuel cells |
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Method of fabricating airlaid articles and apparatus for performing the method
| Details |
Inventors: Svaighert, Mike;
Assignee: Svaighert; Mike (Hallandale, FL); International Design & Mfg., Inc. (Hallandale, FL)
Primary Examiner: Aftergut; Jeff H.
Assistant Examiner:
Attorney, Agent or Firm: Lerner; Herbert L., Greenberg; Laurence A.
A method and an apparatus is used for forming airlaid articles such as diapers, sanitary napkins and the like. The apparatus includes an anvil drum with die cavities formed therein. The die cavities have foraminous bottom walls for drawing a stream of air-entrained fibrous fluff therethrough. A first material layer is laid on the anvil drum for covering some of the die cavities and is then deformed into the cavities. After a belt with opening corresponding to the die cavities has been laid on the first layer for protecting the sealing areas from fluff, an air stream with fibrous fluff is drawn through the first layer and through the foraminous bottom walls, thus pulling the first layer into the die cavities and causing the fluff to be deposited in the cavities. A second material layer is placed on the deposited fluff and glued or crimped to the first layer. A die-cutting roller then cuts the airlaid articles into the desired shape before the articles are removed from the anvil drum. |
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DETAILED DESCRIPTION It is accordingly an object of the invention to provide a method and an apparatus for fabricating airlaid articles such as sanitary napkins and diapers, which overcome the hereinafore-mentioned disadvantages of the heretofore-known methods and devices of this general type and which allow for an accurate contour cutting of the product by preparing the finished product directly on the anvil drum, i.
e.
by immobilizing the dressed product in the airlay cavity through the step of cutting the product to its final shape.
It is also an object of the invention to provide a device which allows an increase in the rotational speed of the drum in order to increase productivity, expressed by the number of usable products obtained per unit of time.
It is a further object of the invention to provide a dry pulp mill which allows the use of "low quality" pulp paper while being capable of producing highest grade absorbent fluff.
With the foregoing and other objects in view there is provided, in accordance with the invention, a method of making airlaid articles on an apparatus having an article deposition drum with die cavities formed therein, wherein the die cavities have a given shape and foraminous bottom walls for allowing a stream of air to pass therethrough, which comprises: placing a first layer of material on the drum covering the die cavities; guiding an airstream with fibrous fluff towards some of the die cavities covered with the first layer; drawing air through the foraminous bottom walls of the die cavities for depositing the fibrous fluff on the first layer and holding the layer and the fluff in the cavities for conforming the layer and the fluff to the shape of the die cavities; placing a second layer of material on the drum and covering the filled die cavities; connecting the second and first layers for encapsulating the deposited fluff therebetween; cutting the layers of material to a desired shape enclosing the deposited fibrous fluff for forming the airlaid article; and removing the airlaid article from the drum
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Nonmetallic Processes 
