US4021296A — Method and device for manufacturing a continuous …

Claim 1

Independent Claim 142 words

An improved method of manufacturing a continuous material web of elongated fibrous particles from a suspension of the fibrous particles with a concentration at least twice as high as the sediment concentration of the fibrous particles, in which the highly concentrated suspension is distributed and deflected in a chamber before the suspension is passed to a decay channel from which the suspension is deposited, the improvement comprising passing the highly concentrated suspension through an intermediate forming channel having a substantially uniform channel height between the chamber and the outlet channel and causing said suspension to undergo a number of substantially equal angular changes of direction as the suspension passes a series of bends in the intermediate channel to change the direction of orientation amongst the fibres themselves which in turn causes local variations of the fibre concentration in the suspension to decrease.

Claim 2

Dependent Claim 142 words

An improved method of manufacturing a continuous material web of elongated fibrous particles from a suspension of the fibrous particles with a concentration at least twice as high as the sediment concentration of the fibrous particles, in which the highly concentrated suspension is distributed and deflected in a chamber before the suspension is passed to a decay channel from which the suspension is deposited, the improvement comprising passing the highly concentrated suspension through an intermediate forming channel having a substantially uniform channel height between the chamber and the outlet channel and causing said suspension to undergo a number of substantially equal angular changes of direction as the suspension passes a series of bends in the intermediate channel to change the direction of orientation amongst the fibres themselves which in turn causes local variations of the fibre concentration in the suspension to decrease.

Claim 3

Dependent Claim 29 words

The method in accordance with claim 1, in which the changes of direction are caused by passage of the suspension on a sinusoidally sinuous path through said intermediate channel.

Claim 4

Dependent Claim 18 words

The method in accordance with claim 1, comprising repeated deflections of the suspension, alternating in successively opposite directions.

Claim 5

Dependent Claim 22 words

The method according to claim 1, comprising changes of direction achieved by repeated deflections of the suspension, upwards and downwards in succession.

Claim 6

Dependent Claim 23 words

The method according to claim 1, in which the suspension is passed to a diverging outlet after the end of said intermediate channel.

Claim 7

Dependent Claim 22 words

The method according to claim 5, in which the suspension is passed through a constriction between said intermediate channel and said outlet.

Claim 8

Dependent Claim 21 words

The method according to claim 1, in which the suspension is exposed to a strong expansion after said changes of direction.

Claim 9

Dependent Claim 14 words

The method according to claim 7, in which the strong expansion takes place slowly.

Claim 10

Dependent Claim 108 words

An improved device for manufacturing a continuous material web of elongated fibrous particles outgoing from a suspension of the fibrous particles which has a concentration equal to at least twice the sediment concentration of the fibrous particles, and of the type having a chamber, in which the high concentration suspension is distributed and deflected and a decay channel wherefrom the suspension is deposited, the improvement comprising an intermediate forming channel between the chamber and the outlet channel and having generally uniformly spaced upper and lower walls which walls have mutually opposed substantially similar means for deflecting the suspension upwards and downwards through substantially equal angular changes of direction.

Claim 11

Dependent Claim 108 words

An improved device for manufacturing a continuous material web of elongated fibrous particles outgoing from a suspension of the fibrous particles which has a concentration equal to at least twice the sediment concentration of the fibrous particles, and of the type having a chamber, in which the high concentration suspension is distributed and deflected and a decay channel wherefrom the suspension is deposited, the improvement comprising an intermediate forming channel between the chamber and the outlet channel and having generally uniformly spaced upper and lower walls which walls have mutually opposed substantially similar means for deflecting the suspension upwards and downwards through substantially equal angular changes of direction.

Claim 12

Dependent Claim 21 words

Device according to claim 9, wherein the deflecting means comprises opposed cuts and bars with angular profiles on the channel walls.

Claim 13

Dependent Claim 19 words

Device according to claim 9, wherein the deflecting means comprises rounded opposed cuts and bars on the channel walls.

Claim 14

Dependent Claim 27 words

Device according to claim 9, wherein opposed bars and cuts on the channel upper and lower walls stretch across the direction of the flow of the suspension.

Claim 15

Dependent Claim 21 words

Device according to claim 9, wherein the deflecting means comprises sinusoidal bends in the upper and lower walls of the channel.

Claim 16

Dependent Claim 24 words

Device according to claim 9, wherein the deflecting means comprises bars on one wall placed opposite cuts on the other wall of the channel.

Claim 17

Dependent Claim 25 words

Device according to claim 9, wherein bars and cuts formed in the channel walls stretch out in the direction of the flow of the suspension.

Claim 18

Dependent Claim 21 words

Device of claim 9, wherein bars and cuts formed in the channel walls are aligned in two directions crossing each other.

Claim 19

Dependent Claim 39 words

Device of claim 9, wherein bars on one wall of the channel are placed opposite cuts in the other wall of the channel in such a way that the channel's height is substantially constant in each channel cross section.

Claim 20

Dependent Claim 33 words

Device according to claim 9, wherein the intermediate forming channel has one stretch with a channel height which differs from the average channel height present in the rest of the intermediate forming channel.

Claim 21

Dependent Claim 34 words

Device according to claim 18, wherein the stretch having a different height has a substantially constant height and is preceded by an abrupt passage leading from a part of the forming channel next ahead.

Claim 22

Dependent Claim 16 words

Device according to claim 18, wherein the stretch of different height has its height slowly decreasing.

Claim 23

Dependent Claim 17 words

Device according to claim 18, wherein the stretch of different height has a continually increasing channel height.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1980-05-02	1980-11-01	1981-05-03	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1984-05-02	1984-11-01	1985-05-03	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1988-05-02	1988-11-01	1989-05-03	$7700.00	Window Closed / Lapsed

Method and device for manufacturing a continuous material web of elongated fibrous particles

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