Web superposing device and bag making apparatus

A web superposing device for use in a bag making apparatus configured to successively make double bags, the double bags each having a first outer panel, a second outer panel, a first inner panel, and a second inner panel, the first and second inner panels facing each other and being interposed between the first and second outer panels, the web superposing device comprising:

• a first slitter for slitting a first main web into a first outer panel web for the first outer panel and a second outer panel web for the second outer panel as the first main web is fed from a first roll;
• a second slitter for slitting a second main web into a first inner panel web for the first inner panel and a second inner panel web for the second inner panel as the second main web is fed from a second roll;
• a superposing roller pair;
• a first guide mechanism for guiding the first main web through the first slitter and guiding the first and second outer panel webs to the superposing roller pair, wherein the first guide mechanism is configured to keep the first and second outer panel webs separated from each other until the first and second outer panel webs reach the superposing roller pair to form a space between the first and second outer panel webs;
• and
• a second guide mechanism for guiding the second main web through the second slitter and guiding the first and second inner panel webs from the space to the superposing roller pair to superpose the first outer panel web, the second outer panel web, the first inner panel web, and the second inner panel web on each other at the superposing roller pair.