Retrieving method of roll type microfilm
专利汇可以提供Retrieving method of roll type microfilm专利检索，专利查询，专利分析的服务。并且PURPOSE:To increase the accurateness of the data for the automatic retrieval with a simple method, by adding a head display part into which the roll number, etc. of a film are written with use of small and large image marks to the head of the film roll. CONSTITUTION:The small and large image marks are used for the binary codes by noticing that a retrieving machine used for the image count system has a function to discriminate the size of the marks. The head display part into which the roll number and the display of correcting state are written with the hexadecimal notation number for example is added to the head of the film roll and read by the retrieving machine to check the erroneous retrieval. In such a way, the film roll number and the correcting state within a magazine set to the retrieving machine can be known to realize the automatic checking for both the roll number and the correcting state which are controlled by a computer. Thus the accurateness of the data can be increased in a simple way.，下面是Retrieving method of roll type microfilm专利的具体信息内容。
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