Alfa Laval Corporation Ab

Lennart Stenstrom

Lennart S Wahlstrom

Processing plant for preparation of food and pharmaceutical products

A drum rotatable about an axis through its center of gravity carries troughs located in a circle concentric to said axis and which are charged at a certain level with flowing material to be measured as to quantity, whereby the drum is influenced by a driving moment from the weight of the charged material. After a certain rotation of the drum, the troughs discharge the charged material at a lower level than said charging level. Means are provided for counteracting rotation of the drum by said driving moment, said means including interconnected scoops arranged in a circle concentric to an axis through the common center of gravity of the scoops, said last axis forming an angle with a vertical line. The drum rotates the scoops around said last-mentioned axis, and the scoops successively elevate a second material from a certain level and discharge it at a higher level. The drum forms a closed chamber containing a certain amount of the second material, and the scoops are located on the inside of the drum within said chamber, whereby an accurate measurement of the weight of the flowing material is effected regardless of changes in the density of the material.

Apparatus for weighing a flowing material

One of a plurality of members is rotated by driving means relative to another member around an axis, the members forming between them a narrow passage extending around the rotation axis and serving for through-flow of a liquid to be heat treated, the driving means effecting relative movement between the walls defining the narrow passage, so that the liquid flowing therethrough is heated by internal friction in the liquid. The passage has a liquid inlet spaced from the rotation axis; and the passage extends from this inlet, via a point spaced a greater distance from the axis than is the inlet, to a liquid outlet located closer to the axis than is said point. Liquid flowing through the passage from the inlet to the outlet is heated by internal friction substantially in a small part of the passage located farthest from the axis; and one of the members is operable to transfer heat from liquid situated in the passage, and which has passed the passage part farthest from the axis, to liquid which is on its way in the passage to the part farthest from the axis.

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141 38 Huddinge, Sweden

Lennart Stenstrom