| 主权项 |
1. A combination of an accommodation cassette and at least one frame unit seated within the accommodation cassette, the combination comprising:
the frame unit comprising a frame including a circular opening therein, an attachment tape positioned within the circular opening of the frame and a wafer attached to the attachment tape; the accommodation cassette comprising:
a right side wall;a left side wall provided parallel to the right side wall;a rear wall adapted to connect the rear edges of the right and left side walls, wherein the rear wall connects to the right and left side walls at right angles;a plurality of right accommodating grooves that are formed on the inner surface of the right side wall and extend longitudinally and parallel to each other at vertical spacings;a plurality of left accommodating grooves that are formed on the inner surface of the left side wall and extend longitudinally and parallel to each other at the vertical spacings in such a manner as to be associated with the right accommodating grooves;a plurality of rear accommodating grooves that are formed only in the laterally central area of the inner surface of the rear wall, without extending to the right and left accommodating grooves, and that extend laterally and parallel to each other at the vertical spacings in such a manner as to be associated with the right and left accommodating grooves; and means for positively preventing the frame unit from being fully inserted into the accommodation cassette in a laterally tilted manner due to erroneous selection of non-aligned right and left accommodation grooves, wherein the full insertion of the accommodation cassette is defined as a situation in which a rear edge portion of the frame unit is placed in the appropriate rear accommodating groove and a front edge portion of the frame unit does not protrude past an open front surface of the accommodation cassette, wherein the right accommodating grooves, the left accommodating grooves, and the rear accommodating grooves are each configured and arranged to receive the frame of the frame unit, wherein the base of each one of the left accommodating grooves and the base of each one of the corresponding right accommodating grooves continuously extend from the open front surface of the accommodation cassette to the rear wall of the accommodation cassette, thereby defining a base plane between each pair of corresponding left and right accommodating grooves, whereby upon the full insertion of the frame unit into the accommodation cassette, the frame unit is seated upon the base plane associated with the relevant pair of corresponding left and right accommodating grooves, wherein the entire left side wall, including the plurality of left accommodating grooves, is integrally molded, and wherein the entire right side wall, including the plurality of right accommodating grooves, is integrally molded. |
