Blank for packing substantially flat articles, a method and machine for making the blank

1. A method of realizing blanks ( 1 ) for packing substantially flat articles ( 4 ) exhibiting substantially polygonal shapes, the method comprising a stage of predisposing a structure ( 2 ) made of a packing material provided with a plurality of fold lines ( 3 ) for folding the structure ( 2 ) at least partially about the at least a flat object ( 4 ), wherein predisposing the structure ( 2 ) comprises stages of:

preparing at least a length ( 5 ) of packing material for each side ( 4 a ) of the substantially polygonal shape of the flat article ( 4 ) to be packed;

creasing each length ( 5 ) along at least two predetermined fold lines ( 3 );

consecutively joining the lengths ( 5 ) in order to define a frame ( 6 ) having a substantially polygonal shape,

wherein each length ( 5 ) is realized starting from a supply of substantially identical panels ( 9 ) of packing material, and

wherein realizing each length ( 5 ) comprises following stages:

supplying two or more panels ( 9 ) in series;

consecutively joining the panels ( 9 ) in order to constitute a continuous strip ( 10 ) of packing material extending prevalently along a predetermined development direction;

cutting the continuous strip ( 10 ) transversally to the development direction thereof, according to a predetermined length thereof.

2. The method of claim 1 , wherein the preparation of each length ( 5 ) comprises predisposing substantially rectangular lengths ( 5 ).

3. The method of claim 1 , wherein the stage of creasing is performed on the continuous strip ( 10 ) previously to the cutting of the continuous strip ( 10 ) into at least a length ( 5 ).

4. The method of claim 1 , wherein the consecutive joining of the lengths ( 5 ) comprises following stages:

depositing a predetermined quantity of glue on at least a length ( 5 );

superposing a consecutive length ( 5 ) at least partially on the glue.

5. The method of claim 1 , wherein the depositing of glue is performed at least an end ( 5 f ) of the at least a length ( 5 ).

6. The method of claim 4 , wherein the depositing of the glue is performed on both ends ( 5 f ) of the at least a length ( 5 ).

7. The method of claim 1 , wherein the method comprises realizing at least a connecting flap ( 5 f ) on at least a length ( 5 ) destined to act on a consecutive length ( 5 ).

8. The method of claim 7 , wherein the realizing of at least a connecting flap ( 5 f ) is done simultaneously with a cutting of the continuous strip ( 10 ) into a length ( 5 ).

9. The method of claim 8 , wherein a stage of applying a protective insert ( 8 ) is performed previously to the stage of joining the lengths ( 5 ).

10. The method of claim 1 , wherein the method comprises a realizing of at least two connecting flaps ( 5 f ) on the at least a length ( 5 ), the connecting flaps ( 5 f ) being predisposed to act on consecutive lengths ( 5 ).

11. The method of claim 1 , wherein the method further comprises at least a stage of applying at least a protective insert ( 8 ) to at least a length ( 5 ).

12. The method of claim 1 , wherein the packing material is corrugated cardboard.

13. The method of claim 1 , wherein the substantially flat articles ( 4 ) are tiles or like construction articles.

14. The method of claim 1 , wherein the frame ( 6 ) has a shape which reproduces the substantially polygonal shape of the flat article ( 4 ) to be packed.

15. The method of claim 1 , wherein the cutting step is set with reference to a corresponding side ( 4 a ) of the substantially polygonal shape of the at least a flat article ( 4 ) to be packed.