Minnesota Mining and Manufacturing Company

Leonard M Volin

James L Albrecht

Harvey D Ogren

The winding system includes several rollers and a rotating drum, around which the web winds before being wound on a core. A cutting and tabbing assembly cuts the web against the rotating drum and cuts and applies the tab on the web in registration with the cut end of the web. The cutting and tabbing assembly includes a wheel, a knife mounted on the wheel, and a tab bar mounted on the wheel adjacent the knife. During the winding of the web on the core the proper amount of tab paper is unwound and moved toward the knife to cut and grab the tab. Then, the knife and tab bar rotate to cut the web while the tab bar applies the tab onto the cut end of the web.

Tab applicator for log roll winders

A continuous log roll winder cuts and transfers on the fly without stopping the winding process. The web passes around a rotating drum with the adhesive side out and travels to a wind-up spindle. A knife cuts the web against the surface of the drum. By heating the knife to temperatures above 300.degree. F., the web and adhesive does not stick to the knife; the adhesive does not accumulate on the knife; and the adhesive does not transfer through the cut in the web backing and deposit on the rotating drum.

Heated web knife

The tail gap winder transfers a web from a first wind-up spindle to a second wind-up spindle by, immediately after the web is cut, pivoting the idler roller to lengthen the distance between the idler roller and the rotating drum to create a gap between the cut ends of the web; moving the first wind-up spindle away from the rotating drum surface as the gap passes under the first wind-up spindle location; moving the second wind-up spindle into contact with the rotating drum surface as the first wind-up spindle moves away; and winding the incoming cut edge around the second wind-up spindle. The idler roller pivots toward the rotating drum to decrease the distance between the idler roller and rotating drum and to take up the extra length of web during the winding portion of the operating cycle.

Growing community of inventors

Grant Township, MN, United States of America

Leonard M Volin