"we remove the seed from the tomato with a pulper rinse seed very good then soak in......."
He probably should have added a comma in that sentence to clarify it a bit more:
"we remove the seed from the tomato with a pulper, then rinse the seed very good, then soak in....."
the pulper is a tool/machine. Rinsing is a separate process. I don't think that was very clear in the original post.