| 摘要 |
The Disclosure is directed to a new method of edge marking recordable webs such as audio and/or video tape. A running tape length is initially established between supply and take-up reels. The running path length is intermittently displaced, parallel to the recording surface, which results in a plurality of spaced, concentric, arcuate wrap segments on the take-up reel whose side edges project beyond the side edges of the remainder of the wraps. The side edges of the projecting wrap segments are then marked in any desired manner such as by bringing the same into marking engagement with a printing or marking die whose approach to the wound take-up reel is limited to insure that the non-projecting wraps are not marked.
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