Apparatus for slitting and adhesively joining parallel webs of material

Claim 1

An apparatus for fabricating and adhesively uniting parallel webs of material obtained from an elongated web of material from which the parallel webs are slit, by an edge-to-edge adhesive joint, comprising two parallel spaced suction ducts for holding the elongated web and the parallel webs which are to be united, a cutting device displaceable on the suction ducts and extending between them for slitting the elongated web and producing from it the parallel webs having clean cut web edges at a gap, and a joining device likewise displaceable on the suction ducts and extending between them, the joining device comprising a lower part beneath the duct surfaces and an upper part above the duct surfaces, each part supporting a roll of adhesive tape and a pressure roller, the rollers being in contact along a line in the plane of the duct surfaces, the upper and lower parts being rigidly connected to one another by a narrow bar which extends obliquely with respect to the plane of the duct surfaces and which is adapted to pass through the plane of the duct surfaces and the gap between the webs which are to be united whereby the tops and bottoms of the webs are joined by the rolls of adhesive tape and the contact of the upper and lower pressure rollers.

Claim 2

An apparatus for fabricating and adhesively uniting parallel webs of material obtained from an elongated web of material from which the parallel webs are slit, by an edge-to-edge adhesive joint, comprising two parallel spaced suction ducts for holding the elongated web and the parallel webs which are to be united, a cutting device displaceable on the suction ducts and extending between them for slitting the elongated web and producing from it the parallel webs having clean cut web edges at a gap, and a joining device likewise displaceable on the suction ducts and extending between them, the joining device comprising a lower part beneath the duct surfaces and an upper part above the duct surfaces, each part supporting a roll of adhesive tape and a pressure roller, the rollers being in contact along a line in the plane of the duct surfaces, the upper and lower parts being rigidly connected to one another by a narrow bar which extends obliquely with respect to the plane of the duct surfaces and which is adapted to pass through the plane of the duct surfaces and the gap between the webs which are to be united whereby the tops and bottoms of the webs are joined by the rolls of adhesive tape and the contact of the upper and lower pressure rollers.

Claim 6

An apparatus for performing simultaneous slitting and joining operations on opposite sides of an elongated web material which is cut into parallel strips with a gap between the parallel strips comprising a pair of parallel spaced ducts having perforated flat upper surfaces, an air exhausting means connected to the ducts for creating a partial vacuum within them whereby the web is firmly maintained in position on and between them, a mobile carriage mounted across the ducts for movement along their length, mobile means mounting the carriage on the ducts for longitudinal movement along them, upper and lower slitting and joining operating sections on the carriage for performing the slitting and joining operations on the portion of the web disposed between the ducts, the joining operating sections each comprise a supply of adhesive tape and pressure means for applying it to the parallel strips at the gap between them, and an inclined narrow connecting bar suspending the lower operating section from the upper and passing through the gap between the parallel strips whereby the tops and bottoms of the strips are joined by the adhesive tape and the contact of the upper and lower pressure means.

Claim 7

An apparatus for performing simultaneous slitting and joining operations on opposite sides of an elongated web material which is cut into parallel strips with a gap between the parallel strips comprising a pair of parallel spaced ducts having perforated flat upper surfaces, an air exhausting means connected to the ducts for creating a partial vacuum within them whereby the web is firmly maintained in position on and between them, a mobile carriage mounted across the ducts for movement along their length, mobile means mounting the carriage on the ducts for longitudinal movement along them, upper and lower slitting and joining operating sections on the carriage for performing the slitting and joining operations on the portion of the web disposed between the ducts, the joining operating sections each comprise a supply of adhesive tape and pressure means for applying it to the parallel strips at the gap between them, and an inclined narrow connecting bar suspending the lower operating section from the upper and passing through the gap between the parallel strips whereby the tops and bottoms of the strips are joined by the adhesive tape and the contact of the upper and lower pressure means.