Modular cardboard container for objects requiring easy inspection, consisting of a stackable interchangeable hollow part or "tunnel" and and a pull-out drawer

Abstract

A container made of bent cardboard and composed of a rectangular tunnel-shaped part in which a drawer is inserted, the drawer having longitudinal walls glued to their respective inner walls with a trapezoidal recess on the two shorter sides for fitting in complementary flaps present at the two sides of the front and rear inner walls of the drawer. The front wall of the drawer is greater than the span of the tunnel so preventing the drawer from penetrating beyond the rear opening of the tunnel, it being pulled out from the front due to the presence of two apertures making a finger-grip. The front wall forms part of a structure holding together the longitudinal walls of the drawer by two spacer flaps joined to the sides of the front inner wall, pressed against two windowed bands joined perpendicularly to their respective longitudinal walls of the drawer, and matching with the front wall on the inner side.

1 . Cardboard container composed of a first part shaped like a tunnel ( 1 ) within which slides a second part shaped like a drawer ( 7 ), said drawer having a base ( 8 ) joined to walls ( 9 ,  10 ,  11 ,  12 ) perpendicular to the base, said walls being bent over inwards along longitudinal creases ( 34 ,  37 ,  40 ,  41 ,  21 ) to form internal walls ( 38 ,  39 ,  20 ,  44 ) for strengthening the drawer from the inside, characterized in that the drawer also includes the following:
 one or more finger-grip apertures ( 15 ,  16 ) cut in a front wall ( 11 );   an external wall ( 42 ) narrower than the front wall to which it is perpendicularly joined towards the inside of the drawer ( 7 );   an internal front wall ( 44 ) perpendicularly joined to said external wall ( 42 );   a spacer wall ( 45 ) perpendicularly joined to the internal front wall ( 44 ) towards the front wall ( 11 );   first and second windowed hemi-walls ( 52 ,  53 ) joined to the respective opposing longitudinal walls ( 9 ,  10 ) of the drawer ( 7 ) in contact with the front wall ( 11 ) inside said drawer ( 7 );   a first pair of flaps ( 48   a ,  49   a ) perpendicularly joined to the internal front wall ( 44 ) at the two sides of it, with their edges against the respective windowed hemi-walls ( 52 ,  53 ), each flap being flush with said external wall ( 42 ) and extending for a length shorter than that of said sides;   a second pair of flaps ( 48   b ,  49   b ) perpendicularly joined to the internal front wall ( 44 ) at the two sides of it, towards the inside of the drawer ( 7 ), next to the flaps of the first pair, and in contact with the respective opposing longitudinal walls ( 9 ,  10 ), within complementary seats made in the relative longitudinal inner walls ( 38 ,  39 ).   
     
     
         2 . The container as in  claim 1 , wherein said longitudinal inner walls ( 38 ,  39 ) are glued to the respective longitudinal walls ( 9 ,  10 ). 
     
     
         3 . The container as in  claim 1 , wherein said complementary seats are recesses on the side of the respective longitudinal inner walls ( 38 ,  39 ) their profile ( 38   c ,  38   d ,  38   e ;  39   c ,  39   d ,  39   e ) matching with the profile of the flap ( 49   b ,  48   b ). 
     
     
         4 . The container as in  claim 3 , wherein said matching profile is that of a rectangular trapezium. 
     
     
         5 . The container as in  claim 1 , wherein the perforated finger-grips ( 15 ,  16 ) consist of two suitably spaced apertures placed side by side, facing onto the windows ( 54 ,  55 ) in the hemi-walls ( 52 ,  53 ) in contact, so facilitating a pull on the drawer by insertion of two fingers. 
     
     
         6 . The container as in  claim 5 , wherein each aperture ( 15 ,  16 ) is rounded at one end to suit the shape of the fingers and, at the other end ( 15   b ,  16   b ) is joined to a retroflexed flap ( 15   a ,  16   a ) of the same shape as the aperture. 
     
     
         7 . The container as in  claim 1 , wherein the drawer ( 7 ) also includes two pairs of matching triangular walls placed between a rear wall ( 12 ) of the drawer ( 7 ) and the rear inner wall ( 20 ) associated to it, one pair for each side, where, for each pair:
 a first triangular wall is joined ( 24 ,  28 ) to the rear wall ( 12 ) of the drawer ( 7 ) in contact with said rear wall;   a second triangular wall is perpendicularly joined ( 25 ,  29 ) to the longitudinal wall ( 38 ,  39 ) on the same side of the drawer;   the two triangular walls are joined by a crease ( 27 ,  31 ), common to both inclined towards a meeting point of all the walls concerned.   
     
     
         8 . The container as in  claim 7 , wherein the drawer ( 7 ) also includes a third pair of flaps ( 22 ,  23 ) perpendicularly joined to the rear inner wall  12  of the drawer ( 7 ) at the two sides, and in contact with a respective longitudinal wall ( 9 ,  10 ) by means of a recess on the side of the associated inner longitudinal wall ( 38 ,  39 ) whose profile matches with that of the flap so forming a join that stabilises the rear structure of the drawer ( 7 ). 
     
     
         9 . The container as in  claim 8 , wherein said matching profile is that of a rectangular trapezium. 
     
     
         10 . The container as in  claim 1  wherein the drawer ( 7 ) includes a handle ( 17 ) joined to the rear wall ( 12 ) and used to raise said drawer ( 1 ,  7 ). 
     
     
         11 . The container as in  claim 2 , wherein said complementary seats are recesses on the side of the respective longitudinal inner walls ( 38 ,  39 ) their profile ( 38   c ,  38   d ,  38   e ;  39   c ,  39   d ,  39   e ) matching with the profile of the flap ( 49   b ,  48   b ).