Westvaco Corporation

Winkler + Dunnebier, Ag

Gregory Georgiades

Wilfred H Gendron

Harland S Fisher

Robert J Carrigan

A device used to separate and discard a skeleton formed when a blank is cut into the pattern of a folding carton, envelope, or other desired shape is provided. The device includes first and second separating cylinders. The second separating cylinder includes at least one protrusion extending from the surface thereof, and also has at least one recess formed therein. The protrusions are used to couple the skeleton to the second cylinder. The device further includes a stripping plate having a leading edge positioned near the second cylinder. At least one stripping finger extends from the edge of the stripping plate and within the recess of the second cylinder. The stripping finger is thereby positioned between the second cylinder and the skeleton as the second cylinder rotates toward the stripping finger. The stripping finger operates to disengage the skeleton from the protrusions, thereby stripping the skeleton from the second cylinder.

Two cylinder one piece pin stripping device

A device for separating and stripping waste material from a blank during a carton or envelope manufacturing process is provided. The device includes first and second separating cylinders. At least one pin and sleeve assembly is coupled to the second separating cylinder, and includes a pin having a sleeve slidably coupled thereto. A tube or hollow bar is coupled to the separating cylinder, and has at least one aperture therein generally aligned with the pin and sleeve assembly. In separating the waste material from the blank, the pin couples the waste material to the second separating cylinder. A fluid such as compressed air is forced into the tube and directed through the aperture to slide the sleeve from a retracted position in which the pin is exposed to an extended position in which the pin is concealed, whereby the waste material is forcibly removed from the pin.

Two piece pin and sleeve stripping system

The two way envelope of the present invention comprises front, rear and return panels that are joined together and folded to provide a semi-permanent fully enclosed pocket for the first mailing and a separate permanent fully enclosed pocket for the return mailing. The permanent pocket for the return mailing is formed by adhering the rear panel to the return panel. The semi-permanent pocket for the first mailing is formed by providing at least the front panel and one of the rear or return panels with side extensions that are adhered together. For return, the side extensions and the front panel are removed leaving intact the return envelope portion with its permanent pocket.

Two way envelope

A rotary converting machine gum box is replenished with adhesive by means of a pumped circulation system which includes a first pump delivery conduit at one end of the gum box and a second pump suction conduit at the other end. A small adhesive pond or trough region between the two gum box ends carries the adhesive flow from one end to the other parallel to the meter roll surface and in flooding contact therewith. Adhesive pond level within the gum box is regulated by a speed differential between the two pumps thereby regulating the relative supply and withdrawal rates of the two pumps.

Converting machine gum box

A rotary cutting apparatus for forming serially connected envelope blanks from a longitudinally advancing web of sheet material is provided with two rotary knives, both of which rotate into cutting relationship with the same stationary knife but at different times. The web of sheet material is advanced over the stationary knife so that at least one side of the web is positioned between the stationary knife and each of the rotary knives to remove a section at the side of the web. With two sets of rotary and stationary knives operating respectively on the two sides of the web, a series of interconnected envelope blanks can be formed by feeding the web through the cutting apparatus at a speed coordinated with the rotations of the knives. By adjusting the angular relationship of the two rotary knives with respect to one another about the axis of rotation, the section of sheet material removed from the advancing web can be varied correspondingly. Such adjustment in conjunction with a change in the feed rate of the web permits envelope blanks, and resulting envelopes, of different sizes to be formed with the same cutting apparatus.

Growing community of inventors

Longmeadow, MA, United States of America

Gregory Georgiades