Severing apparatus

Claim 2

A die for severing sheet material into blanks comprising a plurality of plate members placed in side-by-side relationship to form said die, said die having opposed first sides and opposed second sides generally perpendicular to said opposed first sides and said plate members having first opposed sides providing said first sides of said die and abutting sides generally perpendicular to said first sides and portions extending along said first opposed sides of said plate members to be gripped to secure the plate members during a severing operation, adjacent ones of said plate members each having projection means thereon of substantially uniform height formed integrally with the plate member so as to be one piece therewith and adapted to sever said sheet material, said projection means on adjacent plate members comprising projection means extending transversely to the abutting sides of said plate members to form a continuation of the projection means on the adjacent plate member for severing sheet material to form a side of the blank which lies along a line generally transverse to the abutting side.

Claim 3

A die as defined in claim 1 wherein said plate members are flexible plate members and said projection means are formed by recesses in said plate members.

Claim 4

A die as defined in claim 1 wherein one of said plate members has projection means located along a line extending generally transversely of said first sides of said plate member for severing the entire extent of one side of a blank.

Claim 5

Apparatus for severing material in selected locations comprising first and second cooperable material severing dies, each of said first and second dies having sheet-severing elements in the form of narrow projections extending above the surface of the main body thereof, said sheet-severing elements being disposed on the respective dies to define a layout of the selected material locations to be severed, at least one of said dies comprising at least three separate discrete die sections, each of said die sections having projections thereon comprising the sheet-severing elements thereon, at least one projection on one die section having one end thereof aligned with an adjacent end of another projection on another die section, said projections having the aligned ends cooperating with at least one projection on the other of said dies to form a continuous cut line in the material, said apparatus further comprising an additional die section having projections corresponding in position to the projections on all of said die sections, two die sections of said three die sections being different from each other and said third die section having projections corresponding to all of the projections on said two die sections, said additional die section corresponding with said third one of said die sections so as to be replaceable for the third one of said die sections or for either of the said two die sections upon the removal of selected portions thereof in the event of damage to one of said two die sections.

Claim 6

Apparatus for severing material in selected locations comprising first and second cooperable material severing dies, each of said first and second dies having sheet-severing elements in the form of narrow projections extending above the surface of the main body thereof, said sheet-severing elements being disposed on the respective dies to define a layout of the selected material locations to be severed, at least one of said dies comprising at least three separate discrete die sections, each of said die sections having projections thereon comprising the sheet-severing elements thereon, at least one projection on one die section having one end thereof aligned with an adjacent end of another projection on another die section, said projections having the aligned ends cooperating with at least one projection on the other of said dies to form a continuous cut line in the material, said apparatus further comprising an additional die section having projections corresponding in position to the projections on all of said die sections, two die sections of said three die sections being different from each other and said third die section having projections corresponding to all of the projections on said two die sections, said additional die section corresponding with said third one of said die sections so as to be replaceable for the third one of said die sections or for either of the said two die sections upon the removal of selected portions thereof in the event of damage to one of said two die sections.

Claim 7

A die as defined in claim 3 wherein said plate members are flexible and said projection means are formed by recesses in said plate member.

Claim 8

Apparatus for severing sheet material to form generally rectangular blanks having opposed first sides and opposed second sides extending generally perpendicularly to each other, said apparatus comprising a die-holding member, a die to be mounted onto said die-holding member, said die having portions along opposed first sides to be clamped to connect said die to the die-holding member during the severing operation, said die comprising a plurality of plate members having opposed first sides forming said first sides of said die and opposed second sides generally perpendicular to said first sides with adjacent plate members having ones of said second sides in abutting relationship with each other, die-holding means on said die-holding member for gripping said plate members, said plate members each having first projection means thereon integrally formed as one piece with the body of the plate member and located intermediate said second sides of the plate member and extending generally parallel thereto for severing along one of said second sides of a blank being severed with the projection means for severing the other opposed second side being on a different plate member and second projection means located at opposite ends of said first projection means and extending from said first projection means to at least one of said second sides of said plate member, said second projection means on adjacent die sections being aligned at their ends whereby said first opposed sides of said blank are formed by second projection means on different die sections.

Claim 9

Apparatus for severing sheet material to form generally rectangular blanks having opposed first sides and opposed second sides extending generally perpendicularly to each other, said apparatus comprising a die-holding member, a die to be mounted onto said die-holding member, said die having portions along opposed first sides to be clamped to connect said die to the die-holding member during the severing operation, said die comprising a plurality of plate members having opposed first sides forming said first sides of said die and opposed second sides generally perpendicular to said first sides with adjacent plate members having ones of said second sides in abutting relationship with each other, die-holding means on said die-holding member for gripping said plate members, said plate members each having first projection means thereon integrally formed as one piece with the body of the plate member and located intermediate said second sides of the plate member and extending generally parallel thereto for severing along one of said second sides of a blank being severed with the projection means for severing the other opposed second side being on a different plate member and second projection means located at opposite ends of said first projection means and extending from said first projection means to at least one of said second sides of said plate member, said second projection means on adjacent die sections being aligned at their ends whereby said first opposed sides of said blank are formed by second projection means on different die sections.

Claim 10

Apparatus for severing sheet material as defined in claim 6 in which said die-holding member is a cylinder and said plate members are flexible plates.

Claim 11

Apparatus for severing material in selected locations comprising first and second relatively movable die-support members, first and second cooperable material-severing dies on said first and second die-support members, respectively, each of said first and second dies having Sheet-severing elements in the form of narrow projections extending above the surface of the main body thereof, said sheet-severing elements being disposed on the respective dies to define a layout of the selected material locations to be severed, at least one of said dies comprising a plurality of separate discrete die sections, means for securing each of said die sections to one of said die support members and releasable to provide for selective removal of at least one of said die sections from said die-support member while the other die sections remain secured thereto, each of said die sections having projections thereon comprising the sheet-severing elements thereon, at least one projection on one of said die sections having one end thereof aligned with an adjacent end of another projection on another of said die sections when secured to said one die-support member, and said projections having the aligned ends cooperating with at least one projection on the other of said dies to form a continuous cut line in the material, an additional die section having projections thereon corresponding in position to the projections on all of the die sections and being replaceable for any one of said plurality of die sections upon the removal of selected severing elements therefrom.

Claim 12

Apparatus for severing material in selected locations comprising first and second relatively movable die-support members, first and second cooperable material-severing dies on said first and second die-support members, respectively, each of said first and second dies having Sheet-severing elements in the form of narrow projections extending above the surface of the main body thereof, said sheet-severing elements being disposed on the respective dies to define a layout of the selected material locations to be severed, at least one of said dies comprising a plurality of separate discrete die sections, means for securing each of said die sections to one of said die support members and releasable to provide for selective removal of at least one of said die sections from said die-support member while the other die sections remain secured thereto, each of said die sections having projections thereon comprising the sheet-severing elements thereon, at least one projection on one of said die sections having one end thereof aligned with an adjacent end of another projection on another of said die sections when secured to said one die-support member, and said projections having the aligned ends cooperating with at least one projection on the other of said dies to form a continuous cut line in the material, an additional die section having projections thereon corresponding in position to the projections on all of the die sections and being replaceable for any one of said plurality of die sections upon the removal of selected severing elements therefrom.

Claim 13

Apparatus for severing material in selected locations comprising first and second relatively movable die-support members, first and second cooperable material-severing dies on said first and second die-support members, respectively, each of said first and second dies having sheet-severing elements in the form of narrow projections extending above the surface of the main body thereof, said sheet-severing elements being disposed on the respective dies to define a layout of the selected material locations to be severed, at least one of said dies comprising a plurality of separate discrete die sections, means for securing each of said die sections to one of said die-support members and releasable to provide for selective removal of at least one of said die sections from said die-support member while the other die sections remain secured thereto, each of said die sections having projections thereon comprising the sheet-severing elements thereon, at least one projection on one die section having one end thereof aligned with an adjacent end of another projection on another die section when secured to said one die-support member, and said projections having the aligned ends cooperating with at least one projection on the other die to form a continuous cut line in the material, said first and second die support members being cylinders which define a severing nip and said means for securing each of said die sections to said die-support members comprising axially spaced clamps for securing the leading and trailing edges of the die sections independently to said cylinder for rotation therewith.

Claim 14

Apparatus for severing material in selected locations comprising first and second relatively movable die-support members, first and second cooperable material-severing dies on said first and second die-support members, respectively, each of said first and second dies having sheet-severing elements in the form of narrow projections extending above the surface of the main body thereof, said sheet-severing elements being disposed on the respective dies to define a layout of the selected material locations to be severed, at least one of said dies comprising a plurality of separate discrete die sections, means for securing each of said die sections to one of said die-support members and releasable to provide for selective removal of at least one of said die sections from said die-support member while the other die sections remain secured thereto, each of said die sections having projections thereon comprising the sheet-severing elements thereon, at least one projection on one die section having one end thereof aligned with an adjacent end of another projection on another die section when secured to said one die-support member, and said projections having the aligned ends cooperating with at least one projection on the other die to form a continuous cut line in the material, said first and second die support members being cylinders which define a severing nip and said means for securing each of said die sections to said die-support members comprising axially spaced clamps for securing the leading and trailing edges of the die sections independently to said cylinder for rotation therewith.

Claim 15

Apparatus for severing sheet material as defined in claim 7 wherein said means for gripping said plate members are disposed in a gap extending axially of said cylinder.

Claim 16

Die means for forming blanks comprising a die section for severing sheet material for forming a portion of a blank which is to be severed from the sheet material, the blank having first opposed sides and second opposed sides extending along lines generally perpendicular to said first opposed sides, said first and second opposed sides forming the outer periphery of the blank, said die section forming the outline of part of said blank for the full extent of the blank along one of said second opposed sides and comprising a plate member having first opposed sides and second opposed sides generally perpendicular to each other and defining the outer periphery of the plate member, said plate member having severing projections integrally formed with the body thereof so as to constitute a one-piece element for severing said sheet material along sides of said blank comprising first projection means located along a line intermediate said second opposed sIdes of the plate member and generally parallel thereto for severing along one of said second opposed sides of said blank for its full extent and second projection means located at the opposite ends of said first projection means for severing along said first opposed sides of said blank, said second projection means extending to one of said second opposed sides of said plate member to cooperate with projection means on an adjacent die section for severing the remainder of said first opposed sides of said blank, said die section having portions along its said first opposed sides to be clamped to secure the die during a severing operation.

Claim 17

Die means for forming blanks comprising a die section for severing sheet material for forming a portion of a blank which is to be severed from the sheet material, the blank having first opposed sides and second opposed sides extending along lines generally perpendicular to said first opposed sides, said first and second opposed sides forming the outer periphery of the blank, said die section forming the outline of part of said blank for the full extent of the blank along one of said second opposed sides and comprising a plate member having first opposed sides and second opposed sides generally perpendicular to each other and defining the outer periphery of the plate member, said plate member having severing projections integrally formed with the body thereof so as to constitute a one-piece element for severing said sheet material along sides of said blank comprising first projection means located along a line intermediate said second opposed sIdes of the plate member and generally parallel thereto for severing along one of said second opposed sides of said blank for its full extent and second projection means located at the opposite ends of said first projection means for severing along said first opposed sides of said blank, said second projection means extending to one of said second opposed sides of said plate member to cooperate with projection means on an adjacent die section for severing the remainder of said first opposed sides of said blank, said die section having portions along its said first opposed sides to be clamped to secure the die during a severing operation.

Claim 18

A die section as defined in claim 11 wherein said plate member is of a substantially uniform thickness and said projection means is formed by recesses in said die member.

Claim 19

Die means as defined in claim 11 wherein said die means comprises a second die section having projection means thereon for forming the other of said second opposed sides of said blank and the remainder of said first opposed sides.