[특허]Methods and apparatus for selective placement of fibrous material in formed fibrous articles

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	D04H-001/72 B27N-003/04
출원번호	US-0359011 (1989-05-26)
발명자 / 주소	Wislinski Martin (Edison NJ) Bergquist Roger (Ringoes NJ) Schroeder Manfred (Freehold NJ) Weir Theodore (Mahwah NJ) Monetti Matthew (Howell NJ) Fung Paul (South River NJ)
출원인 / 주소	McNeil-PPC-Inc. (Milltown NJ 02)
인용정보	피인용 횟수 : 47 인용 특허 : 12

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Apparatus and methods for forming improved airlaid fibrous articles are disclosed. Airlaying apparatus is provided which permits at least two types of fibrous materials to be defiberized and transported to a single airlaying apparatus. In a most preferred embodiment, a drum-type airlaying drum havin

Apparatus and methods for forming improved airlaid fibrous articles are disclosed. Airlaying apparatus is provided which permits at least two types of fibrous materials to be defiberized and transported to a single airlaying apparatus. In a most preferred embodiment, a drum-type airlaying drum having a plurality of deposition cavities is provided. By controlling the airflow and pressure differential, selective placement of each type of fibrous material within a cavity is achieved. Also disclosed are improved deposition cavities which permit multiple materials to be airlaid and retained in position by providing a foraminous surface on at least a portion of the cavity sidewall. Most preferably, a hydrophobic fiber layer is formed and a layer of absorbent fiber is deposited within the first layer; the present invention permits a clear demarcation between the fiber types. Also disclosed is improved apparatus for removing airlaid articles from deposition cavities, using a precisely controlled airstream. Improved methods of making airlaid articles by regulating process parameters and using the improved apparatus of the present invention are also disclosed.

대표청구항 ▼

Apparatus for forming fibrous articles having at least two distinct potions of fibrous materials, comprising: (a) first means for defiberizing a first fibrous material; (b) duct means for entraining and transporting the defiberized first fibrous material to a first airlaying location; (c) second mea

Apparatus for forming fibrous articles having at least two distinct potions of fibrous materials, comprising: (a) first means for defiberizing a first fibrous material; (b) duct means for entraining and transporting the defiberized first fibrous material to a first airlaying location; (c) second means for defiberizing a second fibrous material; (d) duct means for entraining and transporting the defiberized second fibrous material to a second airlaying location; (e) airlaying apparatus, comprising: (i) first forming chamber in communication with a duct means, creating a first airlaying location; (ii) second forming chamber in communication with a duct means, creating a second airlaying location; (iii) cavity transport means, having an interior section; (iv) a plurality of deposition cavities disposed on the cavity transport means, at least a portion of each of the deposition cavities comprising a foraminous surface; (v) vacuum chamber means, disposed in the interior section of the cavity transport means, in communication with a least a portion of the foraminous surface of a deposition cavity; (vi) air handling means for creating a controlled pressure differential between the airlaying locations and the interior section of the cavity transport means; and (f) ejection means for removing a fibrous article from the airlaying apparatus whereby the first defiberized material is deposited in at least a portion of a deposition cavity and the second defiberized material is deposited in at least a portion of the same deposition cavity resulting in an article having at least two distinct portions of fibrous materials having a greater proportion of one of said fibrous materials in one lateral planar portion of said article than in another lateral co-planar portion. Deposition cavity apparatus for forming an airlaid article, in communication with a duct carrying a stream of air-entrained fibrous material to an airlaying location, comprising: a frame portion in sealing engagement with the duct; and a foraminous portion, foramen in said foraminous portion being of a size sufficient to retain the air-entrained fibrous materials, whereby an airlaid article is formed in the region of the foraminous portion and further comprising apparatus for creating a negative pressure in a first portion of a deposition cavity and a positive pressure in a second portion of a deposition cavity. A method of forming fibrous articles having at least two distinct portions of fibrous materials, comprising the steps of: (a) defiberizing a first fibrous material; (b) entraining and transporting the defiberized first fibrous material to a first airlaying location; (c) defiberizing a second fibrous material; (d) entraining and transporting the defiberized second fibrous material to a second airlaying location; (e) airlaying the fibrous materials by transporting the first fibrous material to a first forming chamber in communication with a duct means, creating a first airlaying location; transporting the second fibrous materials to a second forming chamber in communication with a duct means, creating a second airlaying location; creating a controlled pressure differential between the airlaying locations and a vacuum chamber; passing the first and second air entrained fibers through a deposition cavity, at least a portion of the deposition cavity comprising a foraminous surface; and ejecting the fibrous article from the airlaying apparatus, whereby the first defiberized material is deposited in at least a portion of a deposition cavity and the second defiberized material is deposited in at least a portion of a deposition cavity resulting in an article having at least two distinct co-planar portions of fibrous materials.

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이 특허에 인용된 특허 (12) 인용/피인용 타임라인 분석

Enloe Kenneth M. (Neenah WI) Wehman Timothy L. (Menasha WI), Apparatus and process for forming a laid fibrous web.
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Angstadt John J. (Cincinnati OH), Apparatus for and methods of forming airlaid fibrous webs having a multiplicity of components.
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Lee Franky B. (Cincinnati OH) Jobes ; Jr. Orin (Cincinnati OH), Apparatus for continuously making an air-laid fibrous web having patterned basis weight distribution.
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Savich Peter P. (Longmeadow MA), Apparatus for forming fibrous pads.
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Feist Barry R. (Cincinnati OH) Carstens Jerry E. (Mason OH) Peterson David A. (Cincinnati OH), Apparatus for making airlaid articles.
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Stemmler Kurt (Neuwied DEX), Apparatus for the manufacture of absorption pads for absorbing body fluid.
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Enloe Kenneth M. (Neenah WI), Controlled formation of light and heavy fluff zones.
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Peterson David A. (Cincinnati OH) Benson Douglas H. (West Harrison IN), Improved method of making discrete airlaid absorbent fibrous articles.
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Fegelman, Karen Juliana; Matos, Claudio Antonio; Van Valkenburgh, Curtis Hunter, Apparatus for making air-laid structures.
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Thomas, Timothy Frederick; Benford, Robert William; Fagg, Barry Smith, Equipment for insertion of objects into smoking articles.
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