Multi-size mailing carton

A mailing carton of the type intended to hold an object such as a book, record, or the like, each object having substantially predetermined width and length but wherein such objects may vary one from the other in thickness, said mailing carton comprising:

• a. one continuous sheet of double-faced corrugated paperboard folded upon itself to form opposed members;
• b. said members having crease lines in registry with one another and extending parallel, perpendicular and at a diagonal to said folds;
• c. said crease lines defining within said members two substantially identically dimensioned four sided panels, said panels being substantially dimensioned to the width and length of the object to be held by said cartons;
• d. said crease lines further defining panels framing said four sided panels;
• a first pair of said framing panels being hingedly joined at said fold thereby forming a V-shaped expandable buffer chamber with the apex thereof extending outwardly of said foursided panels;
• e. said framing panels extending perpendicularly to said fold having their terminal edges co-terminous with the marginal edges of said sheet;
• f. tape means having greater flexibility than said sheet for joining said opposed perpendicular panels at said terminal edges to thereby form two V-shaped buffer panels perpendicular to said folds with the apices of said V-shaped buffer chambers extending outwardly of said four sided panels;
• g. said remaining framing panels forming in combination a fourth V-shaped buffer chamber thereby providing V-shaped expandable buffer chambers contiguous and about all four sides of said four sided panel;
• and
• h. means for closing said carton hingedly joined to said fourth buffer panel;

A blank of the type from which mailing cartons may be fabricated, said blank being of the type made of rigid paperboard comprising:

• equal rectangular panels hingedly secured to one another by a joining crease line and defining at the marginal edges thereof said blank;
• each of said panels having symmetrically disposed, at equal distances from said joining crease line, first and second parallel crease lines and first and second perpendicular crease lines, thereby defining within said rectangular panels symmetrically disposed rectangular panels framed by smaller dimensioned rectangular panels;
• said smaller dimensioned rectangular panels overlapping;
• and diagonal crease lines symmetrically disposed about said blank bisecting said overlapping portion of said smaller rectangular panels;
• and
• narrow glue tabs hingedly secured along crease lines, said crease lines being perpendicular to said crease lines lying hingedly joining said equal panels;
• said glue tabs constituting extensions projecting beyond the terminal edge lines of said opposed panels;
• adhesive applied to said glue panels for securing two of the four sides of said mailing carton.