Method for forming spread nonwoven webs

Details Method for forming spread nonwoven webs Method for forming spread nonwoven webs

2004-09-03

2008-12-30

Tentoni, Leo B (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

C156S167000, C156S181000, C264S103000, C264S211140

Reexamination Certificate

active

07470389

ABSTRACT:
A new fiber-forming method, and related apparatus, and webs prepared by the new method and apparatus are taught. In the new method a) a stream of filaments is extruded from a die of known width and thickness; b) the stream of extruded filaments is directed through a processing chamber that is defined by two narrowly separated walls that are parallel to one another, parallel to said width of the die, and parallel to the longitudinal axis of the stream of extruded filaments; c) the stream of filaments passed through the processing chamber is intercepted on a collector where the filaments are collected as a nonwoven fibrous web; and d) a spacing between the walls of the processing chamber is selected that causes the stream of extruded filaments to spread before it reaches the collector and be collected as a web significantly wider in width than the die. Generally the increase in width is sufficient to be economically significant, e.g., to reduce costs of web manufacture. Such economic benefit can occur in widths that are 50, 100 or 200 or more millimeters greater in width than the width of the die. Preferably, the collected web has a width at least 50 percent greater than said width of the die. The processing chamber is preferably open to the ambient environment at its longitudinal sides to allow pressure within the processing chamber to push the stream of filaments outwardly toward the longitudinal sides of the chamber.

REFERENCES:
patent: 3502763 (1970-03-01), Hartmann
patent: 3528129 (1970-09-01), Hartmann
patent: 3692618 (1972-09-01), Dorschner et al.
patent: 3734803 (1973-05-01), Lipscomb et al.
patent: 3766606 (1973-10-01), Piper et al.
patent: 3783649 (1974-01-01), Yamamoto et al.
patent: 3855045 (1974-12-01), Brock
patent: 3945815 (1976-03-01), Schmidt
patent: 4064605 (1977-12-01), Akiyama et al.
patent: 4086381 (1978-04-01), Cheshire et al.
patent: 4135903 (1979-01-01), Ohsato et al.
patent: 4147749 (1979-04-01), Lipscomb et al.
patent: 4163819 (1979-08-01), Yung et al.
patent: 4173443 (1979-11-01), Lin
patent: 4189338 (1980-02-01), Ejima et al.
patent: 4202855 (1980-05-01), Gerking et al.
patent: 4217387 (1980-08-01), Viezee et al.
patent: 4300876 (1981-11-01), Kane et al.
patent: 4340563 (1982-07-01), Appel et al.
patent: 4405297 (1983-09-01), Appel et al.
patent: 4622259 (1986-11-01), McAmish et al.
patent: 4627811 (1986-12-01), Greiser et al.
patent: 4692106 (1987-09-01), Grabowski et al.
patent: 4692371 (1987-09-01), Morman et al.
patent: 4812112 (1989-03-01), Balk
patent: 4818466 (1989-04-01), Mente et al.
patent: 4820459 (1989-04-01), Reifenhauser
patent: 4838774 (1989-06-01), Balk
patent: 4908163 (1990-03-01), McAmish et al.
patent: 4961695 (1990-10-01), Hirschmann et al.
patent: 4988560 (1991-01-01), Meyer et al.
patent: 5045271 (1991-09-01), Mente et al.
patent: 5244723 (1993-09-01), Anderson et al.
patent: 5270107 (1993-12-01), Gessner
patent: 5292239 (1994-03-01), Zeldin et al.
patent: 5296286 (1994-03-01), Allen et al.
patent: 5340517 (1994-08-01), Koschinek et al.
patent: 5405559 (1995-04-01), Shambaugh
patent: 5460500 (1995-10-01), Geus et al.
patent: 5476616 (1995-12-01), Schwarz
patent: 5525286 (1996-06-01), Bornmann et al.
patent: 5545371 (1996-08-01), Lu
patent: 5547746 (1996-08-01), Burton, Sr.
patent: 5571537 (1996-11-01), Geus et al.
patent: 5599488 (1997-02-01), Profë
patent: 5635290 (1997-06-01), Stopper et al.
patent: 5645790 (1997-07-01), Schwarz et al.
patent: 5648041 (1997-07-01), Rodgers et al.
patent: 5652048 (1997-07-01), Haynes et al.
patent: 5652051 (1997-07-01), Shawver et al.
patent: 5667749 (1997-09-01), Lau et al.
patent: 5688468 (1997-11-01), Lu
patent: 5711970 (1998-01-01), Lau et al.
patent: 5714107 (1998-02-01), Levy et al.
patent: 5714171 (1998-02-01), Profë
patent: 5762857 (1998-06-01), Weng et al.
patent: 5807795 (1998-09-01), Lau et al.
patent: 5814349 (1998-09-01), Geus et al.
patent: 5863639 (1999-01-01), Franke et al.
patent: 5885909 (1999-03-01), Rudisill et al.
patent: 6010588 (2000-01-01), Stahl et al.
patent: 6013223 (2000-01-01), Schwarz
patent: 6117801 (2000-09-01), McGinty et al.
patent: 6136245 (2000-10-01), Lu
patent: 6165217 (2000-12-01), Hayes
patent: 6183684 (2001-02-01), Lu
patent: 6274238 (2001-08-01), DeLucia
patent: 6379136 (2002-04-01), Najour et al.
patent: 2002/0102897 (2002-08-01), Berrigan et al.
patent: 2003/0042651 (2003-03-01), Najour et al.
patent: 2003/0118816 (2003-06-01), Polanco et al.
patent: 2005/0098256 (2005-05-01), Polanco et al.
patent: 40 14 414 (1991-07-01), None
patent: 42 10 464 (1993-10-01), None
patent: 0 538 480 (1993-04-01), None
patent: 487968 (1975-10-01), None
patent: 375664 (1999-12-01), None
patent: WO 00/28123 (2000-05-01), None
patent: WO 02/055782 (2002-07-01), None

Affiliated with

Also associated with

Rating

Method for forming spread nonwoven webs does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for forming spread nonwoven webs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for forming spread nonwoven webs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4046035