Porous film manufacturing apparatus

Claim 2

The apparatus according to claim 1, characterized in that the particle (7) having a Mohs hardness value of not less than 5 is a synthetic diamond particle.

Claim 3

The apparatus according to claim 1, characterized in that the second roll (16) essentially makes of a hard metal.

Claim 4

The apparatus according to claim 1, characterized in that the second roll (16) is formed by coating a polymeric resin layer on a surface of a metal roll body.

Claim 5

The apparatus according to claim 1, characterized in that the first and second rolls (6, 16) are respectively rotated by shafts (9, 18) extending through the centers of said rolls (6, 16), and shaft portions located near two ends thereof are axially supported by bearings (4, 14) incorporated in boxes (5, 15), respectively.

Claim 7

The apparatus according to claim 1, characterized in that a plurality of units, each of which is identical to the unit in which the pressure control means is arranged, are arranged in a conveying direction of the film.

Claim 8

The apparatus according to claim 1, characterized in that destaticizing means (38) is arranged at an outlet of the unit (20).

Claim 9

The apparatus according to claim 8, characterized in that the destaticizing means (38) comprises a vessel (39) in which pure water is stored, and an ultrasonic wave generating member for applying ultrasonic waves to the pure water.

Claim 10

A porous film manufacturing apparatus characterized by comprising: feed means for feeding an elongated film (36); a perforating unit (20) including a first rotatable roll (6) having a surface on which a large number of particles (7), each having acute corner portions and a Mohs hardness value of not less than 5, are deposited, and a second roll (16) which is rotatable in a direction reverse to a rotating direction of the first roll (6), the first and second rolls (6, 16) being arranged to oppose each other and to cause the elongated film (36) to pass therebetween, one of the rolls (6, 16) being stationary, and the other roll (16) being movable in a direction to oppose the one roll (6); pressure control means (35), arranged near two end portions of the movable roll (16) of the unit (20), for controlling a pressure applied from each of the rolls (6, 16) to the film (36); and arc radiation means (41), arranged at an outlet of the unit (20), for radiating an arc on the film (36) conveyed from the unit (20).

Claim 11

The apparatus according to claim 10, characterized in that the particle (7) having a Mohs hardness value of not less than 5 is a synthetic diamond particle.

Claim 12

The apparatus according to claim 10, characterized in that the second roll (16) essentially makes of a hard metal.

Claim 13

The apparatus according to claim 10, characterized in that the second roll (16) is formed by coating a polymeric resin layer on a surface of a metal roll body.

Claim 14

The apparatus according to claim 10, characterized in that the first and second rolls (6, 16) are respectively rotated by shafts (9, 18) extending through the centers of said rolls (6, 16), and shaft portions located near two ends thereof are axially supported by bearings (4, 14) incorporated in boxes (5, 15), respectively.

Claim 16

The apparatus according to claim 10, characterized in that a plurality of units, each of which is identical to said unit in which the pressure control means is arranged, are arranged in a conveying direction of the film.

Claim 17

The apparatus according to claim 10, characterized in that the arc radiation means (41) comprises a rotatable dielectric roll (42) arranged to be separated from the film (36) conveyed from the unit (20) and having a surface on which a large number of fine projections (45) are formed, and an electrode (52), arranged to oppose the dielectric roll (42), for inducing high-voltage discharge between the electrode (52) and the dielectric roll (42) to radiate an arc in the direction of width of the film (36).

Claim 18

The apparatus according to claim 17, characterized in that the large number of projections (45) on the surface of the dielectric roll (42) are formed by coating the surface with a dielectric cloth having a stitch spacing on the micron order.

Claim 19

The apparatus according to claim 10, characterized in that destaticizing means (38) is arranged at an outlet of the arc radiation means (41).

Claim 20

The apparatus according to claim 19, characterized in that the destaticizing means (38) comprises a vessel (39) in which pure water is stored, and an ultrasonic wave generating member for applying ultrasonic waves to the pure water.

Claim 21

A porous film manufacturing apparatus characterized by comprising: feed means for feeding an elongated film (160); a perforating unit (129) including a first rotatable roll (106) having a surface on which a large number of particles (107), each having acute corner portions and a Mohs hardness value of not less than 5, are deposited, a second roll (117) which has a surface made of a hard material and is rotatable in a direction reverse to a rotating direction of the first roll (106), and a third roll (124) which has a surface made of a soft material and is rotatable in a direction reverse to the rotating direction of the first roll (106), the first to third rolls (106, 117, 124) being arranged to oppose each other with the first roll (106) being a middle roll of the first to third rolls (106, 117, 124) and to cause the elongated film (160) to pass between the first and second rolls (106, 117) and between the first and third rolls (106, 124), the first roll (106) being stationary, and the second and third rolls (117, 124) being movable in a direction to oppose the first roll (106); first pressure control means (144), arranged near two end portions of the second roll (117) of the unit (129), for controlling pressures applied from the first and second rolls (106, 119) to the film (160); and second pressure control means (159), arranged near two end portions of the third roll (124) of the unit (129), for controlling pressures applied from the first and third rolls (106, 124) to the film (160).

Claim 22

The apparatus according to claim 21, characterized in that the particle (107) having a Mohs hardness value of not less than 5 is a synthetic diamond particle.

Claim 23

The apparatus according to claim 21, characterized in that the second roll (117) essentially makes of a hard metal.

Claim 24

The apparatus according to claim 21, characterized in that the third roll (124) is formed by coating a polymeric resin layer on a surface of an iron roll body.

Claim 25

The apparatus according to claim 21, characterized in that the first to third rolls (106, 117, 124) are respectively rotated by shafts (109, 119, 127) extending through the centers of the rolls (106, 117, 124), and shaft portions located near two ends thereof are axially supported by bearings (104, 115, 122) incorporated in boxes (105, 116, 123), respectively.

Claim 28

The apparatus according to claim 21, characterized in that a plurality of units, each of which is identical to the unit in which said first and second pressure control means are arranged, are arranged in a conveying direction of the film.

Claim 29

The apparatus according to claim 21, characterized in that destaticizing means (162) is arranged at an outlet of the unit (129).

Claim 30

The apparatus according to claim 29, characterized in that the destaticizing means (162) comprises a vessel (163) in which pure water is stored, and an ultrasonic wave generating member for applying ultrasonic waves to the pure water.

Claim 31

A porous film manufacturing apparatus characterized by comprising: feed means for feeding an elongated film (160); a perforating unit (129) including a first rotatable roll (106) having a surface on which a large number of particles (107), each having acute corner portions and a Mohs hardness value of not less than 5, are deposited, a second roll (117) which has a surface made of a hard material and is rotatable in a direction reverse to a rotating direction of the first roll (106), and a third roll (124) which has a surface made of a soft material and is rotatable in a direction reverse to the rotating direction of the first roll (106), the first to third rolls (106, 117, 124) being arranged to oppose each other with the first roll (106) being a middle roll of the first to third rolls (106, 117, 124) and to cause the elongated film (160) to pass between the first and second rolls (106, 117) and between the first and third rolls (106, 124), the first roll (106) being stationary, and the second and third rolls (117, 124) being movable in a direction to oppose the first roll (106); first pressure control means (144), arranged near two end portions of the second roll (117) of the unit (129), for controlling pressures applied from the first and second rolls (106, 117) to the film (160); second pressure control means (159), arranged near two end portions of the third roll (124) of the unit (129), for controlling pressures applied from the first and third rolls (106, 124) to the film (160); and arc radiation means (165), arranged at an outlet of the unit (129), for radiating an arc on the film (160) conveyed from the unit (129).

Claim 32

The apparatus according to claim 31, characterized in that the particle (107) having a Mohs hardness value of not less than 5 is a synthetic diamond particle.

Claim 33

The apparatus according to claim 31, characterized in that the second roll (117) essentially makes of a hard metal.

Claim 34

The apparatus according to claim 31, characterized in that the third roll (124) is formed by coating a polymeric resin layer on a surface of an iron roll body.

Claim 35

The apparatus according to claim 31, characterized in that the first to third rolls (106, 117, 124) are respectively rotated by shafts (109, 119, 127) extending through the centers of the rolls (106, 117, 124), and shaft portions located near two ends thereof are axially supported by bearings (104, 115, 122) incorporated in boxes (105, 116, 123), respectively.

Claim 38

The apparatus according to claim 31, characterized in that a plurality of units (129₁, 129₂), each of which is identical to said unit in which the first and second pressure control means (144₁, 144₂, 159₁, 159₂) are arranged, are arranged in a conveying direction of the film (160).

Claim 39

The apparatus according to claim 31, characterized in that the arc radiation means (165) comprises a rotatable dielectric roll (166) arranged to be separated from the film (160) conveyed from the unit (129) and having a surface on which a large number of fine projections (169) are formed, and an electrode (176), arranged to oppose the dielectric roll (166), for inducing high-voltage discharge between the electrode (176) and the dielectric roll (166) to radiate an arc in the direction of width of the film (160).

Claim 40

The apparatus according to claim 39, characterized in that the large number of projections (169) on the surface of the dielectric roll (166) are formed by coating the surface with a dielectric cloth having a stitch spacing on the micron order.

Claim 41

The apparatus according to claim 31, characterized in that destaticizing means (162) is arranged at an outlet of the arc radiation means (165).

Claim 42

The apparatus according to claim 41, characterized in that the destaticizing means (162) comprises a vessel (163) in which pure water is stored, and an ultrasonic wave generating member for applying ultrasonic waves to the pure water.