US 4,306,849 A · Apparatus for providing bottom blanks for containers in a manufacturing process

Abstract

The present invention is directed to an apparatus and method wherein bottom blanks for containers are severed from a web feed roll and subsequently transferred at a compatible speed and spacing to final forming mandrels on which finished containers are to be formed. The bottom blanks are tangentially transferred from a first transfer turret at a final velocity and spacing most desirable for cutting and minimizing scrap to a second transfer turret at a second velocity and spacing and thereafter tangentially transferred to the final forming mandrels. Subsequently, preprinted rectangular blanks of longitudinally stretch-oriented foam sheet material formed into cylinders are transferred onto the final forming mandrels. Thereafter, the bottom blanks the cylindrical blanks and the final forming mandrels are heated to shrink the cylindrical blanks so that they assume the shape of the final forming mandrels. The top curl on containers such as drinking cups and food tubs is formed after shrink forming. Further, the bottom seam of the container is reinforced by ironing after shrink forming.

Claims49

Dependent claims

Apparatus for forming and transferring a series of bottom blanks from a severing station to individual transitory work stations at a velocity and spacing compatible with that of said work stations comprising:

means located at said severing station for severing and translating bottom blanks of a desired shape from the surrounding selvage of a web of stock at a first spacing and velocity minimizing selvage remaining in the web;
transfer means for receiving severed bottom blanks from said severing and translating means at an increased velocity and spacing compatible with that of said work stations, said transfer means including means for substantially instantaneous transfer of said bottom blanks from said means for severing and translating;
and
means coordinated with said work stations and said transfer means for transferring said severed bottom blanks from said transfer means onto respective ones of said work stations.

1 more element

rotary die means cooperating with a rotary anvil turret means located at said severing station for continuously severing and translating bottom blanks from the surrounding selvage of a web of stock continuously fed therebetween at a first spacing and velocity minimizing the selvage remaining in said web;
rotary transfer turret means for receiving severed bottom blanks from said rotary anvil turret means at an increased velocity and spacing compatible with that of said work stations, said rotary transfer and turret means including means for substantially instantaneous tangental transfer of said bottom blanks from said rotary anvil turret means;
and
means coordinated with said stations and said rotary turret means for transferring said severed bottom blanks from said rotary transfer means onto respective ones of said work stations.

1 more element

Dependencies are inferred from the claim text.

Apparatus for providing bottom blanks for containers in a manufacturing process

Life of this patent

Apparatus for providing bottom blanks for containers in a manufacturing process

Life of this patent

Abstract

Claims49