Envelope body for levies laboratory blood

摘要

The method involves continuously assembling a top paper sheet (19), intermediate paper sheets (20, 21) and a bottom paper sheet (22) with waterproof finishing through gluing, perforations (4, 6), deposition of adhesive tapes (2, 7) with protectors, and different cuttings, so as to form perfectly sealed and opaque pouches with modulable finishing in outlet of a gathering machine. Additional sheets (15-18) are arranged on the top paper sheet. The paper sheets with the waterproof finishing are sealed by adhesive stripes (1).