| 摘要 |
A dynamic shrimp grader and grading method of universal application to all types of shrimp which in a first embodiment (FIGS. 1-6) utilizes a series of sequential, slightly inclined trays, each hving a number of parallel V-shaped channels with grading slots at their end. The trays are mounted on an upper frame which is driven by an eccentric drive upwardly and simultaneously forwardly with respect to the grader's basic support structure, imparting a dynamic action, the upper frame and basic support structure being connected together by a number of angularly disposed, flexible reinforced fiberglass strip springs. Shrimp enter at the top of the grader moving down the channels under the dynamic action of the moving trays and are graded by their width, the smaller falling through the slots in the upper trays, the slot width and length becoming larger from each upper tray to the succeeding lower tray. The shrimp are aligned generally vertically by the sides of the channel and have a tendency to flatten out under the dynamic action of the trays as they progress down the channel (FIG. 8A-8C). The V-shaped channels are formed by means of joining together an alternating series of flat strips (FIG. 5) or alternatively by appropriately bending a single strip (FIGS. 5A). A second embodiment (FIG. 7) utilizes a single flat tray with a staggered series of progressively larger, grading holes therein in place of the trays with the V-shaped channels of the first embodiment.
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