Apparatus for preparing air-laid nonwoven webs from combined str

Plastic article or earthenware shaping or treating: apparatus – Air felting type shaping means – Means forming running length product

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Details

191455, 191563, 156 622, D01G 2500, B29C 1300

Patent

active

039633926

ABSTRACT:
A process and apparatus for forming a wide variety of air-laid nonwoven webs, with the apparatus including plural pairs of spaced parallel oppositely rotating lickerins, each pair having a movable divider plate therebetween. The lickerins individualize fibers from separate fibrous sources, which may be similar or dissimilar, and high speed air streams are caused to flow past each individual lickerin, through a mixing zone between each pair of lickerins to form combined streams, and into a common mixing zone above a fiber collecting means to form a composite stream. The individualized fibers are doffed from the lickerins by the high speed air streams and are entrained therein, and divider plates between each pair of lickerins are adjustable through a range of positions for controlling the degree of intermixing of the entrained fibers in the combined streams. A further divider plate is mounted in adjustable relationship with respect to the common mixing zone to control the degree to which the combined streams and entrained fibers intermix in forming the composite stream. The air streams may be generated by a single suction source below the fiber collecting means, or by separate individually controlled suction sources on opposite sides of the further divider plates, which may be individually adjusted to further vary the web that is formed on the fiber collecting means. The further divider plate is preferably removably mounted so that a further material, such as a reinforcing material or an adhesive can be introduced into the composite stream and resulting web, if desired.

REFERENCES:
patent: 3395426 (1968-08-01), Langdon
patent: 3535187 (1970-10-01), Wood
patent: 3768118 (1973-10-01), Ruffo et al.

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