Conveyor for web

A system having a plurality of treatment stations arrayed along a horizontal treatment path, the system comprising:

• a conveyor having a guide extending horizontally and displaceable in a direction through the stations from an upstream end to a downstream end of the path;
• intake means for feeding an end of a web to the upstream end of the path;
• a bar magnet carried on the conveyor and extending a full width of the web;
• a first holder above the path adjacent the upstream end;
• a magnetizable metal plate in the first holder, whereby movement of the conveyor displaces the bar magnet underneath the web at the first holder and attracts the magnetizable metal plate;
• and
• a picker on the bar magnet configured to engage with the magnetizable metal plate on advancement of the bar magnet past the magnetizable metal plate, and sweep the magnetizable metal plate off the first holder onto the web and thereby magnetically press the web with the magnetizable metal plate against the guide and entrain the web with the conveyor.