Continuous mixer

Claim 2

A rotor for use in a continuous internal mixer of the type used for mixing rubber, plastic and the like, having a material feeding portion and a mixing portion axially adjacent thereto, said mixing portion having first and second pairs of blades formed in a generally continuous rotor surface and extending inward from opposite ends thereof, the blades of each pair being displaced one from the other approximately 180* circumferentially about the rotor, each pair extending in a generally opposite helical path toward the center of the rotor, the blades of the first pair being displaced peripherally about the rotor from the second pair.

Claim 3

A rotor for use in a continuous internal mixer of the type used for mixing rubber, plastic and the like, having a material feeding portion and a mixing portion axially adjacent thereto, said mixing portion having first and second pairs of blades formed in a generally continuous rotor surface and extending inward from opposite ends thereof, the blades of each pair being displaced one from the other approximately 180* circumferentially about the rotor, each pair extending in a generally opposite helical path toward the center of the rotor, the blades of the first pair being displaced peripherally about the rotor from the second pair, with the inner ends of the blades of the first pair being overlapped axially with respect to the inner ends of the blades of the second pair.

Claim 4

A rotor for use in a continuous internal mixer of the type used for mixing rubber, plastic and the like, having a material feeding portion and a mixing portion axially adjacent thereto, said mixing portion having first and second pairs of blades formed in a generally continuous rotor surface and extending inward from opposite ends thereof, the blades of each pair being displaced one from the other approximately 180* circumferentially about the rotor, each pair extending in a generally opposite helical path toward the center of the rotor, the blades of the first pair being displaced peripherally about the rotor from the second pair, with the inner ends of the blades of the first pair being overlapped axially with respect to the inner ends of the blades of the second pair.

Claim 5

A rotor for use in a continuous internal mixer of the type used for mixing rubber, plastic and the like, having a material feeding portion and a mixing portion axially adjacent thereto, said mixing portion having first and second pairs of blades formed in a generally continuous rotor surface and extending inward from opposite ends thereof, the blades of each pair being displaced one from the other approximately 180* circumferentially about the rotor, each pair extending in a generally opposite helical path toward the center of the rotor, the blades of the first pair being displaced peripherally about the rotor from the second pair, the blades of one pair adjacent the material feeding portion being shorter than the blades of the other pair, the inner ends of the longer blades being located axially to one side of the center of the mixing portion, and the blades of both pairs having constant cross-sectional area between opposite ends.

Claim 6

A rotor for use in a continuous internal mixer of the type used for mixing rubber, plastic and the like, having a material feeding portion and a mixing portion axially adjacent thereto, said mixing portion having first and second pairs of blades formed in a generally continuous rotor surface and extending inward from opposite ends thereof, the blades of each pair being displaced one from the other approximately 180* circumferentially about the rotor, each pair extending in a generally opposite helical path toward the center of the rotor, the blades of the first pair being displaced peripherally about the rotor from the second pair, the blades of one pair adjacent the material feeding portion being shorter than the blades of the other pair, the inner ends of the longer blades being located axially to one side of the center of the mixing portion, and the blades of both pairs having constant cross-sectional area between opposite ends.

Claim 7

A rotor for use in a continuous internal mixer of the type used for mixing rubber, plastic and the like, having a material feeding portion and a mixing portion axially adjacent thereto, both with a basic central cylindrical body portion and extending blades, said mixing portion having first and second pairs of blades formed in a generally continuous rotor surface and extending axiAlly inward from opposite ends of the mixing portion, the blades of each pair being displaced one from the other approximately 180* circumferentially about the rotor, each pair extending in a generally opposite helical path toward the center of the rotor, the blades of the first pair being displaced peripherally about the rotor from the blades of the second pair, and gaps separating the inner ends of adjacent blades, said gaps being of sufficient depth to extend radially inward to a location that approximately corresponds to the circumference of the basic central body portion of the rotor.

Claim 8

A rotor for use in a continuous internal mixer of the type used for mixing rubber, plastic and the like, having a material feeding portion and a mixing portion axially adjacent thereto, both with a basic central cylindrical body portion and extending blades, said mixing portion having first and second pairs of blades formed in a generally continuous rotor surface and extending axiAlly inward from opposite ends of the mixing portion, the blades of each pair being displaced one from the other approximately 180* circumferentially about the rotor, each pair extending in a generally opposite helical path toward the center of the rotor, the blades of the first pair being displaced peripherally about the rotor from the blades of the second pair, and gaps separating the inner ends of adjacent blades, said gaps being of sufficient depth to extend radially inward to a location that approximately corresponds to the circumference of the basic central body portion of the rotor.

Claim 9

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber, a pair of parallel adjacent rotors in said chamber, each rotor having a material feeding portion and an axially adjacent mixing portion, the feeding and mixing portions of each rotor being adjacent the corresponding portion of the other, a first of said rotors having two blades each with blade portions twisting in opposite directions, and a second of said rotors having four blades arranged in pairs, one pair adjacent each opposite end of the mixing portion, the blades of each pair twisting in opposite directions from those of the other and terminating centrally of the mixing portion in peripherally spaced relationship.

Claim 10

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber, a pair of parallel adjacent rotors in said chamber, each rotor having a material feeding portion and an axially adjacent mixing portion, the feeding and mixing portions of each rotor being adjacent the corresponding portion of the other, a first of said rotors having two blades each with blade portions twisting in opposite directions, and a second of said rotors having four blades arranged in pairs, one pair adjacent each opposite end of the mixing portion, the blades of each pair twisting in opposite directions from those of the other and terminating centrally of the mixing portion in peripherally spaced relationship.

Claim 11

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber, a pair of side-by-side rotors in said chamber, each rotor having a material feeding portion and an axially adjacent mixing portion, the feeding and mixing portions of each rotor being adjacent the corresponding portion of the other, a first of said rotors having two blades each with blade portions twisting in opposite directions, and a second of said rotors having four blades arranged in pairs, one pair adjacent each opposite end of the mixing portion, the blades of each pair twisting in opposite directions from those of the other and terminating centrally of the mixing portion in peripherally spaced and axially overlapped relationship.

Claim 12

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber, a pair of side-by-side rotors in said chamber, each rotor having a material feeding portion and an axially adjacent mixing portion, the feeding and mixing portions of each rotor being adjacent the corresponding portion of the other, a first of said rotors having two blades each with blade portions twisting in opposite directions, and a second of said rotors having four blades arranged in pairs, one pair adjacent each opposite end of the mixing portion, the blades of each pair twisting in opposite directions from those of the other and terminating centrally of the mixing portion in peripherally spaced and axially overlapped relationship.

Claim 13

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber, a pair of side-by-side rotors in said chamber, each rotor having a material feeding portion and an axially adjacent mixing portion, the feeding and mixing portions of each rotor being adjacent the corresponding portion of the other, a first of said rotors having to two blades each with two oppositely twisting portions that meet at a location axially to one side of the center of the mixing portion, and a second of said rotors having four blades arranged in pairs, one pair adjacent each opposite end and twisting in opposite directions from those of the other, terminating centrally of the mixing portion in peripherally spaced and axially overlapped relationship, and the blades of one pair being longer than the blades of the other pair, the inner ends of the blades of both pairs being located axially to one side of the center of the mixing portion opposite from the side at which the blade portions of the blades of the first rotor meet.

Claim 14

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber, a pair of side-by-side rotors in said chamber, each rotor having a material feeding portion and an axially adjacent mixing portion, the feeding and mixing portions of each rotor being adjacent the corresponding portion of the other, a first of said rotors having to two blades each with two oppositely twisting portions that meet at a location axially to one side of the center of the mixing portion, and a second of said rotors having four blades arranged in pairs, one pair adjacent each opposite end and twisting in opposite directions from those of the other, terminating centrally of the mixing portion in peripherally spaced and axially overlapped relationship, and the blades of one pair being longer than the blades of the other pair, the inner ends of the blades of both pairs being located axially to one side of the center of the mixing portion opposite from the side at which the blade portions of the blades of the first rotor meet.

Claim 15

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber with an inlet adjacent one end and an outlet adjacent an opposite end, first and second substantially parallel rotors in said chamber each with a screw feed portion adjacent the inlet end of the chamber and a bladed mixing portion adjacent the outlet end of the chamber, the mixing portion of said first rotor having two oppositely projecting blades each with portions that curve or twist generally helically in opposite directions along the axial extent of the mixing portion, and which meet at an apex offset axially from the center of the mixing portion, and the mixing portion of said second rotor having two pairs of oppositely projecting blades, one pair extending from from each end of the mixing portion in generally helical paths axially toward the center and terminating in axially overlapped and peripherally spaced relationship, the blades Of one pair curving or twisting in an opposite direction from the blades of the other pair, with corresponding blade portions considered in an axially outward direction from the respective inner ends thereof being displaced angularly, i.e., peripherally one from the other about the rotor, and one pair of blades being longer than the other, with the adjacent ends of the pairs being offset axially from the center of the mixing portion on an opposite side of the center from the apices of the blades on said first rotor and said blades of said second rotor all having approximately the same helix angle and each blade having a substantially constant cross-sectional area along its length.

Claim 16

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber with an inlet adjacent one end and an outlet adjacent an opposite end, first and second substantially parallel rotors in said chamber each with a screw feed portion adjacent the inlet end of the chamber and a bladed mixing portion adjacent the outlet end of the chamber, the mixing portion of said first rotor having two oppositely projecting blades each with portions that curve or twist generally helically in opposite directions along the axial extent of the mixing portion, and which meet at an apex offset axially from the center of the mixing portion, and the mixing portion of said second rotor having two pairs of oppositely projecting blades, one pair extending from from each end of the mixing portion in generally helical paths axially toward the center and terminating in axially overlapped and peripherally spaced relationship, the blades Of one pair curving or twisting in an opposite direction from the blades of the other pair, with corresponding blade portions considered in an axially outward direction from the respective inner ends thereof being displaced angularly, i.e., peripherally one from the other about the rotor, and one pair of blades being longer than the other, with the adjacent ends of the pairs being offset axially from the center of the mixing portion on an opposite side of the center from the apices of the blades on said first rotor and said blades of said second rotor all having approximately the same helix angle and each blade having a substantially constant cross-sectional area along its length.

Claim 17

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber with an inlet and an outlet adjacent opposite ends thereof, a pair of side-by-side rotors in said chamber, each rotor having side-by-side mixing portions within said chamber, the mixing portion of one of said rotors having four blades arranged in pairs at opposite ends of the mixing portion, each of the four blades being spaced peripherally from the next adjacent blade at a central part of the mixing portion and the mixing portion of the other rotor having two blades that extend continuously the length of the mixing portion.

Claim 18

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber with an inlet and an outlet adjacent opposite ends thereof, a pair of side-by-side rotors in said chamber, each rotor having side-by-side mixing portions within said chamber, the mixing portion of one of said rotors having four blades arranged in pairs at opposite ends of the mixing portion, each of the four blades being spaced peripherally from the next adjacent blade at a central part of the mixing portion and the mixing portion of the other rotor having two blades that extend continuously the length of the mixing portion.

Claim 19

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber with a material inlet and a material outlet adjacent opposite ends thereof, and two rotors in said chamber, each rotor extending axially between said opposite ends of the chamber and each having a mixing portion adjacent that of the other, at least one of said mixing portions having first and second pairs of blades extending inward from opposite ends thereof, the blades of each of said pairs being displaced one blade from the other circumferentially about the rotor and each of said pairs extending in generally oppositely twisting paths toward the center of the rotor and displaced peripherally about the rotor from the other pair.

Claim 20

In a continuous mixer of the type used to mix rubber, plastic and the like, a chamber with a material inlet and a material outlet adjacent opposite ends thereof, and two rotors in said chamber, each rotor extending axially between said opposite ends of the chamber and each having a mixing portion adjacent that of the other, at least one of said mixing portions having first and second pairs of blades extending inward from opposite ends thereof, the blades of each of said pairs being displaced one blade from the other circumferentially about the rotor and each of said pairs extending in generally oppositely twisting paths toward the center of the rotor and displaced peripherally about the rotor from the other pair.