The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 1979
Filed:
Jul. 07, 1977
Paul Meyer, Wiesbaden, DE;
Frenkel C-D Aktiengesellschaft, Vaduz, LU;
Abstract
A continuous mixer comprising at least one mixing zone formed by a Transfermix geometry in which the number of starts of the helical thread changes for each of the components along the length of said Transfermix zone in the opposite sense to the change of the cross-sectional area of helical grooves on said component, whereby when in operation a medium moves along said Transfermix zone, portions thereof are successively transferred between the grooves of facing helical threads as giver and taker and whereby grooves of larger cross-sectional area are of greater widths than grooves of small cross-sectional area; in a preferred embodiment the mixer has a driven rotor and stationary barrel, the helical threads thereon being of opposite hand and the number of starts facing one another at any cross-section of the Transfermix zone is such as to make a substantially constant product.