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1. 发明专利

JPH0811845A METHOD AND DEVICE FOR DETECTING SEALED PART IN CONTINUOUS SMALL PACKAGE RIBBON 失效
公开(公告)号：JPH0811845A
公开(公告)日：1996-01-16
申请号：JP14275294
申请日：1994-06-24
申请人： TOYO ENGINEERING CORP
发明人： OISHI KOICHI , TSUJIURA MICHIO , TSUJI MASANORI
IPC分类号： B65B61/04 , B65B61/20
摘要： PURPOSE:To enable detecting the center or substantially the center of a sealed part without being influenced by anything abnormal of a pouch by using for a signal denoting detection of the sealed part the logical product of a differential signal at the time that a first set of photoprojectors/receptors are at the sealed part and a second set of photoprojectors/ receptors are at a pouch as yet and a differential signal at the time that both the two sets of photoprojectors/receptors are at the sealed part. CONSTITUTION:Two sets of laser projectors/receptors X, Y are provided side by side. A differential signal of the photoreception outputs of the two photoreceptors X, Y is obtained. This differential signal becomes the largest when the first set of photoprojectors/receptors X are at a sealed part 3 and the second set of photoprojectors/receptors Y are at a pouch 2 as yet. The differential signal falls to zero when subsequently the second set of photoprojectors/receptors Y are also at the sealed part 3. By following this condition in terms of a logical product the median position between the two sets of photoprojectors/ receptors X, Y at the time that these are both at the sealed part 3 can be detected as the position of a sealed part to be cut off. The practice of this detection is free from an error which is due to shrinking in a pouch 2, swelling in a sealed part 3, etc., and the center or substantially the center of a sealed part 3 can be detected with good certainty.

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