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US 4,228,121 AGranted
Method and apparatus for forming multiple thickness bead
AssigneePeerless Machine & Tool Corporation
InventorWilliam R. Meadors
Life of this patent
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AssigneePeerless Machine & Tool Corporation
InventorWilliam R. Meadors
Estimating the term…
A method and apparatus for forming a double-thickness bead in a flexible sheet stock article, such as a container or lid constructed from paper stock. The method includes holding a central region of the paper stock blank near its perimetral edge between cooperating dies, forming an axially extending flange in the blank between the held region and the edge, capturing the edge against radial movement in a groove provided in a ring movable relative to the dies, and moving the ring relative to the dies to form the double-thickness region in the blank between the held portion and edge. The apparatus includes the cooperating relatively movable dies, the movable ring and cooperating draw pads adjacent the ring. The draw pads are movable relative to the dies and ring and cooperate with the dies and ring to form a void into which the double-thickness region is formed. The configuration of the void controls the formation and configuration of the bead.
A method for forming a bead in an article formed from a blank of flexible material comprising holding a central region of the blank between two cooperating dies, while holding said central region, forming an axially extending flange in the region of the blank between said central region and the perimetral edge of the blank, capturing the perimetral edge against radial movement in a first groove provided in a ring movable with respect to said dies, moving the ring relative to the dies to form the region of the blank between the central region and the perimetral edge into a bead, and moving with respect to said dies and said ring cooperating draw pads provided adjacent said ring, the cooperating draw pads cooperating with the ring and dies to create a void into which the bead is formed, the configuration of the void controlling the formation of the bead.
Apparatus for forming a bead in a blank of flexible sheet material comprising opposed first and second cooperating dies for holding a central region of the blank, a ring and opposed first and second draw pads disposed about said cooperating dies and movable axially with respect to the first and second dies cooperatively to capture the perimetral region of the blank surrounding the central region to form the perimetral region into an axially extending flange having a proximal end attached to the central region and a distal end axially spaced from the proximal end, the ring including means defining a first groove for capturing the distal end against radial movement, means for moving the ring and first and second draw pads cooperatively with the distal end engaged in the first groove to form between the proximal and distal edges a bead, and cooperating surfaces of the ring and the first and second draw pads defining a void to control the shape of the bead.
An apparatus for forming a blank of sheet material into a plate, tray, dish or the like having a central region and an outer perimetral edge region, said apparatus comprising cooperating first and second dies for holding a central region of the blank, opposed first and second draw pads disposed respectively about said first and second dies for engaging the outer perimetral edge region of the blank, and means for forming a bead on the outer perimetral edge region of the blank, said forming means including a ring disposed about one of said dies between said one die and said draw pad disposed about said one die, said ring including means for engaging the outer perimetral edge of said blank, and means for reciprocating said ring relative to said dies and said draw pads.
Dependencies are inferred from the claim text.