FIELD: technological processes.
SUBSTANCE: in the formation of bonded parts (70) of sheets, which are obtained by welding first layer (21) of the sheet material to second layer (22) of the sheet material the way the bonded parts of the sheets are orthogonal to elastic stretchable elements (19) and are spaced in the (MD) direction of processing, by transmitting, squeezing and heating first layer (21) of the sheet material, second layer (22) of the sheet material and long thin elastic stretchable elements (19), which are located between them the way they are continuous in the direction MD, between first roller (90), on the outer circumferential peripheral surface of which the fastening comb-shaped protrusions (91) are provided with intervals in the direction along the circumference, and second roller (92) facing the said first roller (90), the formulated problem is solved by: forming grooves (92d), which are continuous in the direction along the circumference, on the squeezing surface of second roller (92), squeezing and heating the zones in which elastic stretching elements (19) pass, in places that include grooves (92d) of second roller (92), and squeezing and heating zones in which elastic stretch elements (19) do not pass, in places other than grooves (92d) of second roller (92).
EFFECT: preventing cutting of elastic stretchable elements caused by welding.
8 cl, 26 dwg
