Tray forming apparatus
AssigneeWestRock Shared Services, LLC
InventorRobert M. Herrin
Life of this patent
Estimating the term…
Abstract
A tray forming apparatus forms a blank into a tray having a double glued side wall construction for providing a desirable strength to the tray. A platen drives the blank through a forming rails which fold the blank into a partially formed tray having bottom, end and side walls, and inside corner supports formed about the platen. The platen is retracted prior to folding arms further extended portions of the partially formed tray. A compression plate and the folding arms are biased against adhesive portions of the tray for forming a fully formed tray having a double glued side wall construction.
Claims22
A machine for forming a container from a blank of sheet material, the blank including at least one bottom panel, two opposing side panels, two opposing end panels, and an outside corner support member, the machine comprising:
- a platen for moving the blank from a first position to a second position downstream therefrom;
- a first folding arm movably positioned for folding at least a portion of the outside corner support member to form the blank into a partially formed container;
- at least one compression member carried in spaced relation to the partially formed container;
- a fixed plate carried in spaced relation to the at least one compression member, the fixed plate and the at least one compression member forming a passage therebetween;
- and
- a second folding arm positioned for biasing against the outside corner support member, wherein the fixed plate is positioned for contacting an outer edge of the outside corner support member and guiding at least a portion of the outside corner support member through the passage to a position where the outer edge of the outside corner support member is substantially perpendicular to the at least one bottom panel of the container.
A machine for forming a container from a blank of sheet material, the blank including at least one bottom panel, two sets of opposing side panels, and an outside corner support member, the machine comprising:
- a platen for moving the blank from a first position to a second position downstream therefrom;
- a first folding arm movably positioned for folding at least a portion of the outside corner support member to form the blank into a partially formed container;
- at least one compression member carried in spaced relation to the partially formed container;
- a fixed plate carried in spaced relation to the at least one compression member, the fixed plate and the at least one compression member forming a passage therebetween;
- and
- a second folding arm positioned for biasing against the outside corner support member, wherein the fixed plate is positioned for contacting an outer edge of the outside corner support member and guiding at least a portion of the outside corner support member along the surface of the fixed plate through the passage to a position where the outer edge of the outside corner support member is substantially perpendicular to the at least one bottom panel of the container.
A machine for forming a container from a blank of sheet material, the blank including at least one bottom panel, a first set of opposing side panels, a second set of opposing side panels, and an outside corner support member, wherein the outside corner support member includes at least a top wall portion, a first fold portion coupled to the top wall portion, and a second fold portion coupled to the first fold portion, the machine comprising:
- a platen for moving the blank from a first position to a second position downstream therefrom;
- a first folding arm movably positioned for folding at least the top wall portion of the outside corner support member to form the blank into a partially formed container;
- at least one compression member carried in spaced relation to the partially formed container;
- a fixed plate carried in spaced relation to the at least one compression member, the fixed plate and the at least one compression member forming a passage therebetween;
- and
- a second folding arm positioned for biasing against the outside corner support member, wherein the fixed plate is positioned for contacting an outer edge of the first fold portion and guiding the first fold portion through the passage, wherein the second folding arm, the fixed plate, and the at least one compression member work together to position the first fold portion and the second fold portion in a squared-off corner structure.
Dependencies are inferred from the claim text.