| 摘要 |
Methods and apparatus for controlling the registration of a first elongated continuous structure (e.g., plastic fastener tape) with attachments (e.g., sliders) or formed features (e.g., slider end stop structures), as it is fed to a sealing station, where it is joined to a second elongated continuous structure (e.g., a web of packaging material) with formed features (e.g., thermoformed troughs). The second elongated continuous structure is intermittently advanced through the machine by the same distance each advancement. During each dwell time, the first elongated continuous structure is processed, i.e., structural features are attached and/or formed. Proper registration of the structural features on the first elongated continuous structure with the second elongated continuous structure is accomplished by adjusting the distance that the unjoined upstream portion of the first elongated continuous structure advances as a function of feedback acquired downstream.
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