Blank cutting machine

Claim 2

A machine for cutting envelope blanks from a stacK of paper stock, comprising: a. frame means, b. vertically movable die head means mounted on said frame means, c. said die head means including a die head having a die plate removably secured to the lower surface of the die head, e. said blade means comprising left and right front blades and left and right rear blades, f. each of said blades secured to a base plate forming part of said blade means, g. each of said base plates being adjustably mounted for selective positioning on said die plate, h. bed means connected in said frame means below said die head means, i. die block means on said bed means horizontally movable between an operational position immediately under said die head means and a loading position removed from said position immediately under said die head means, j. said die block means including a non-metallic body member and a relatively thin cutting board removably secured to the upper surface of said body member, k. said cutting board comprising a sheet of plastic material.

Claim 3

The machine of claim 1 further characterized in that: a. a front section of said die plate lower surface has a series of longitudinally extending grooves therein, b. a back section of said die plate lower surface has a transversely extending series of generally cylindrical apertures formed therein, c. at least one of said front blades having a ridge extending from the mounting surface of its base plate and adapted to seat in a selected groove on said front section, d. at least one of said rear blades having a rotatable disk seated in the mounting surface of its base plate with a pin protruding from said disk in eccentric relationship to the axis of the disk, e. said pin on said rotatable disk adapted to seat in a selected one of said apertures on said back section.

Claim 4

A machine for cutting envelope blanks from a stack of paper stock, comprising: a. frame means, b. vertically movable die head means mounted on said frame means, c. bed means in said frame means below said die means, d. die block means on said bed means horizontally movable on roller means between an operational position immediately under said die head means and a loading position removed from said position immediately under said die head means, e. said movable die head means including a die head having a die plate removably secured to the lower surface of the die head, f. blank cutting blade means fastened to the lower surface of the die plate, g. said blade means comprising left and right front blades and left and right rear blades, h. each of said blades secured to a base plate, i. a front section of said die plate lower surface having a series of longitudinally extending grooves therein, j. a back section of said die plate lower surface having a transversely extending series of generally cylindrical apertures formed therein, k. at least one of said front blades having a ridge extending from the mounting surface of its base plate and adapted to seat in a selected groove on said front section, l. at least one of said rear blades having a rotatable disk seated in the mounting surface of its base plate with a pin protruding from said disk in eccentric relationship to the axis of the disk, m. said pin on said rotatable disk adapted to seat in a selected one of said apertures on said back section.

Claim 5

A machine for cutting envelope blanks from a stack of paper stock, comprising: a. frame means, b. vertically movable die head means mounted on said frame means, c. bed means in said frame means below said die means, d. die block means on said bed means horizontally movable on roller means between an operational position immediately under said die head means and a loading position removed from said position immediately under said die head means, e. said movable die head means including a die head having a die plate removably secured to the lower surface of the die head, f. blank cutting blade means fastened to the lower surface of the die plate, g. said blade means comprising left and right front blades and left and right rear blades, h. each of said blades secured to a base plate, i. a front section of said die plate lower surface having a series of longitudinally extending grooves therein, j. a back section of said die plate lower surface having a transversely extending series of generally cylindrical apertures formed therein, k. at least one of said front blades having a ridge extending from the mounting surface of its base plate and adapted to seat in a selected groove on said front section, l. at least one of said rear blades having a rotatable disk seated in the mounting surface of its base plate with a pin protruding from said disk in eccentric relationship to the axis of the disk, m. said pin on said rotatable disk adapted to seat in a selected one of said apertures on said back section.