| 摘要 |
<p>A microfilm jacket has a plurality of parallel channels, each channel having at its insert opening a protruding upper-lip 73 formed by a curved slit extending rearwardly on both sides and serving to guide microfilm 50 fed beneath the lip 73 into the insert opening. The ends of the slits may extend different distances rearwardly for different parallel channels. The upper and lower walls of the jacket may have different thicknesses. <IMAGE></p> |
