Colloid injection mill

Claim 2

In a colloid mill having a housing, a rotor shaft supported within said housing, a rotor mounted on said shaft for rotation therewith, said rotor having a conically shaped outer surface defining one wall of a milling zone, a stator positioned in concentric, milling relationship about said rotor, the inner surface of said stator being conical and defining the other wall of said milling zone, said milling zone extending a predetermined distance along the axial length of the rotor, a main product inlet at one end of said milling zone adjacent the enlarged end of said rotor, and a product outlet at the other end of said milling zone, the improvement comprising: a. a secondary product passageway leading from a point exterior to said mill to a point in communication with said milling zone, said passageway including:

Claim 3

A main conduit extending axially through said rotor from the enlarged end adjacent said main product inlet to a point spaced from its other end, and 2. at least one radially extending conduit leading from said main conduit to a point on the outer surface of said rotor and in communication with said milling zone intermediate said main product inlet and said product outlet.

Claim 4

A main conduit extending axially through said rotor from the enlarged end adjacent said main product inlet to a point spaced from its other end, and 2. at least one radially extending conduit leading from said main conduit to a point on the outer surface of said rotor and in communication with said milling zone intermediate said main product inlet and said product outlet.

Claim 5

at least one radially extending conduit leading from said main conduit to a point on the outer surface of said rotor and in communication with said milling zone intermediate said main product inlet and said product outlet.

Claim 6

at least one radially extending conduit leading from said main conduit to a point on the outer surface of said rotor and in communication with said milling zone intermediate said main product inlet and said product outlet.

Claim 7

In a colloid mill as defined in claim 1 further including: a. a main product chamber disposed within said housing in communication with said main product inlet and with one wall being defined by the enlarged end of said rotor; b. a first opening in said housing connecting the exterior of the mill to said main product chamber and through which said main product is introduced into said mill; c. a secondary product chamber disposed axially outwardly of said main product chamber; d. a rotor shaft extension connected to the enlarged end of said rotor and extending through said main product chamber and into said secondary product chamber, said rotor shaft extension having a conduit extending axially therethrough and connecting the main conduit of said rotor to said secondary product chamber; e. sealing means for sealing said main product chamber from said secondary product chamber; and f. a second opening in said housing connecting the exterior of said mill to said secondary product chamber and through which said secondary product is introduced into said mill.

Claim 8

In a colloid mill as defined in claim 2 wherein said housing includes: a. a main structure for supporting said rotor shaft and stator, b. a first sub-structure defining the outer wall of said main product chamber; and c. a second sub-structure defining a wall portion of said secondary product chamber; and d. means for removably connecting said sub-structures to said main structure to provide access to said rotor for replacement thereof.

Claim 9

In a colloid mill as defined in claim 2 wherein said rotor includes a. a plurality of radially extending conduits connected to the outer surface of said rotor at points equally spaced from the product inlet to said milling zone.

Claim 10

In a colloid mill as defined in claim 4 wherein: a. said radially extending conduits are disposed in a common plane extending perpendicular to the longitudinal axis of said rotor.