Method of making a convolute tube

Claim 1

A METHOD OF MAKING CONVOLUTELY WOUND, ADHESIVELY SECURED TUBES OF AT LEAST TWO PLIES FROM ELONGATE SHEET MATERIAL HAVING OPPOSED FIRST AND SECOND SURFACES AND FIRST AND SECOND LONGITUDINAL SIDE EDGES AND BEING CHARACTERIZED BY ELIMINATING THE NECESSITY OF HAVING A HIGH MOISTURE CONTENT IN THE ADHESIVE FOR HOLDING THE WOUND TUBE TOGETHER IMMEDIATELY FOLLOWING WINDING AND THEREBY AVOIDING A SUBSEQUENT DRYING STEP, SAID METHOD COMPRISING THE STEPS OF, APPLYING RELATIVELY SLOW ACTING, LOW MOISTURE ADHESIVE TO A MAJOR PORTION OF THE FIRST SURFACE OF THE SHEET MATERIAL WHILE LEAVING A FIRST LONGITUDINALLY EXTENDING BAND FREE OF SLOW ACTING, LOW MOISTURE ADHESIVE IN CLOSE PROXIMITY TO THE FIRST LONGITUDINAL EDGE BUT SPACED SLIGHTLY THEREFROM ALLOWING THE SLOW ACTING, LOW MOISTURE ADHESIVE TO BE ALSO POSITIONED IMMEDIATELY ALONG THE FIRST LONGITUDINAL EDGE, AND WHILE LEAVING A SECOND LONGITUDINALLY EXTENDING BAND FREE OF SLOW ACTING, LOW MOISTURE ADHESIVE ADJACENT THE SECOND LONGITUDINAL SIDE EDGE OF THE SHEET MATERIAL, APPLYING RELATIVELY FAST ACTING ADHESIVE ALONG THE FIRST LONGITUDINALLY EXTENDING BAND FREE OF SLOW ACTING, LOW MOISTURE ADHESIVE ON THE FIRST SURFACE OF THE SHEET MATERIAL, APPLYING A LUBRICANT ALONG THE SECOND LONGITUDINALLY EXTENDING BAND FREE OF SLOW ACTING, LOW MOISTURE ADHESIVE ON THE FIRST SURFACE OF THE SHEET MATERIAL, APPLYING RELATIVELY LOW ACTING ADHESIVE ON THE SECOND SURFACE OF THE SHEET MATERIAL ALONG A PORTION ADJACENT THE SECOND LONGITUDINALLY EXTENDING EDGE, AND

Claim 2

A METHOD OF MAKING CONVOLUTELY WOUND, ADHESIVELY SECURED TUBES OF AT LEAST TWO PLIES FROM ELONGATE SHEET MATERIAL HAVING OPPOSED FIRST AND SECOND SURFACES AND FIRST AND SECOND LONGITUDINAL SIDE EDGES AND BEING CHARACTERIZED BY ELIMINATING THE NECESSITY OF HAVING A HIGH MOISTURE CONTENT IN THE ADHESIVE FOR HOLDING THE WOUND TUBE TOGETHER IMMEDIATELY FOLLOWING WINDING AND THEREBY AVOIDING A SUBSEQUENT DRYING STEP, SAID METHOD COMPRISING THE STEPS OF, APPLYING RELATIVELY SLOW ACTING, LOW MOISTURE ADHESIVE TO A MAJOR PORTION OF THE FIRST SURFACE OF THE SHEET MATERIAL WHILE LEAVING A FIRST LONGITUDINALLY EXTENDING BAND FREE OF SLOW ACTING, LOW MOISTURE ADHESIVE IN CLOSE PROXIMITY TO THE FIRST LONGITUDINAL EDGE BUT SPACED SLIGHTLY THEREFROM ALLOWING THE SLOW ACTING, LOW MOISTURE ADHESIVE TO BE ALSO POSITIONED IMMEDIATELY ALONG THE FIRST LONGITUDINAL EDGE, AND WHILE LEAVING A SECOND LONGITUDINALLY EXTENDING BAND FREE OF SLOW ACTING, LOW MOISTURE ADHESIVE ADJACENT THE SECOND LONGITUDINAL SIDE EDGE OF THE SHEET MATERIAL, APPLYING RELATIVELY FAST ACTING ADHESIVE ALONG THE FIRST LONGITUDINALLY EXTENDING BAND FREE OF SLOW ACTING, LOW MOISTURE ADHESIVE ON THE FIRST SURFACE OF THE SHEET MATERIAL, APPLYING A LUBRICANT ALONG THE SECOND LONGITUDINALLY EXTENDING BAND FREE OF SLOW ACTING, LOW MOISTURE ADHESIVE ON THE FIRST SURFACE OF THE SHEET MATERIAL, APPLYING RELATIVELY LOW ACTING ADHESIVE ON THE SECOND SURFACE OF THE SHEET MATERIAL ALONG A PORTION ADJACENT THE SECOND LONGITUDINALLY EXTENDING EDGE, AND

Claim 5

A method of making convolutely wound, adhesively secured tubes from elongate sheet material having opposed first and second surfaces and first and second longitudinal side edges and being characterized by eliminating the necessity of having a high moisture content in the adhesive for holding the wound tube together immediately following winding and thereby avoiding a subsequent drying step, said method comprising the steps of, applying relatively slow acting, low moisture adhesive to the first surface of the sheet material while leaving at least one longitudinally extending band free of slow acting, low moisture adhesive substantially adjacent the first longitudinal edge, applying relatively fast acting adhesive along the longitudinally extending adhesive free band on the first surface of the sheet material, and convolutely winding a predetermined length of the elongate sheet material transversely of the length into a convolute tube with the second surface of the sheet material forming the outside surface of the tube and with the first longitudinal edge having the relatively fast acting adhesive adjacent thereto forming the outside trailing edge of the tube for immediate adherence of the trailing edge portion to the outer surface of the convolute tube to retain the convolute tube in the wound condition during activation of the slow acting, low moisture adhesive to bond the convolute tube in the wound condition, said step of applying relatively slow acting, low moisture adhesive to the first surface of the sheet material including leaving a second longitudinally extending band free of slow acting, low moisture adhesive adjacent the second longitudinal side edge of the sheet material, said step of convolutely winding the elongate sheet material into a convolute tube including forming the inside leading edge of the tube from the second longitudinal side edge of the sheet material, applying a lubricant along the second longitudinally extending adhesive free band on the first surface of the sheet material; and applying relatively slow acting adhesive along the second longitudinally extending edge on the second surface of the sheet material for adhering the leading inside edge of the sheet material to the inside surface of the convolute tube when wound.

Claim 6

A method of making convolutely wound, adhesively secured tubes from elongate sheet material having opposed first and second surfaces and first and second longitudinal side edges and being characterized by eliminating the necessity of having a high moisture content in the adhesive for holding the wound tube together immediately following winding and thereby avoiding a subsequent drying step, said method comprising the steps of, applying relatively slow acting, low moisture adhesive to the first surface of the sheet material while leaving at least one longitudinally extending band free of slow acting, low moisture adhesive substantially adjacent the first longitudinal edge, applying relatively fast acting adhesive along the longitudinally extending adhesive free band on the first surface of the sheet material, and convolutely winding a predetermined length of the elongate sheet material transversely of the length into a convolute tube with the second surface of the sheet material forming the outside surface of the tube and with the first longitudinal edge having the relatively fast acting adhesive adjacent thereto forming the outside trailing edge of the tube for immediate adherence of the trailing edge portion to the outer surface of the convolute tube to retain the convolute tube in the wound condition during activation of the slow acting, low moisture adhesive to bond the convolute tube in the wound condition, said step of applying relatively slow acting, low moisture adhesive to the first surface of the sheet material including leaving a second longitudinally extending band free of slow acting, low moisture adhesive adjacent the second longitudinal side edge of the sheet material, said step of convolutely winding the elongate sheet material into a convolute tube including forming the inside leading edge of the tube from the second longitudinal side edge of the sheet material, applying a lubricant along the second longitudinally extending adhesive free band on the first surface of the sheet material; and applying relatively slow acting adhesive along the second longitudinally extending edge on the second surface of the sheet material for adhering the leading inside edge of the sheet material to the inside surface of the convolute tube when wound.