Integrated vertical portable inkjet printer

An integrated vertical inkjet printer for printing on a vertical substrate, comprising:

• a controller;
• a main trolley carrying a main trolley body;
• a first extension trolley carrying a first extension trolley body;
• two first horizontal rails detachably connecting said main trolley body and said first extension trolley body;
• and
• a printing assembly movable along said two first horizontal rails;
• said printing assembly comprises:
• a plurality of inkjet printing head assemblies mounted on a platform;
• a vertical telescopic tandem beam system comprising:
• a first printing beam, wherein said platform is slidable along said first printing beam;
• and
• a second printing beam detachably insertable between said first printing beam and said main trolley body;
• a first motor configured to drive said platform vertically;
• and
• a second motor configured to drive said first printing beam along said second printing beam;
• wherein said plurality of inkjet printing head assemblies comprise printing heads mounted to the right and to the left of said platform;
• and
• wherein said controller is configured to perform special printing sequences when said heads reach the right wall or the left wall of said substrate, respectively.

A method of printing on a vertical substrate, comprising:

• providing a printing assembly comprising four printing head assemblies, two background printing head assemblies, two image UV monochromatic light Emitting Diodes (UV LEDs) and two background monochromatic light Emitting Diodes (UV LEDs);
• printing, by said two background printing head assemblies, a background color while moving in a first horizontal direction from a starting point;
• curing, by said two background UV LEDs, said background color;
• moving said two background printing head assemblies to the other side of said printing assembly;
• returning, by said printing assembly, in a second horizontal direction to said starting point;
• printing, by said printing head assemblies, while moving in said first horizontal direction an image;
• and
• curing, by said two image UV LEDs, said printed image.

A timing belt mechanism system, comprising:

• a first timing belt mechanism, comprising:
• at least two first pulleys;
• wherein at least one of said at least two first pulleys is activated by a first motor;
• and
• a first timing belt comprising outer teeth on the outer circumferential surface of said first timing belt, stretched around said at least two first pulleys and configured to be moved by said at least one of said at least two first pulleys activated by said first motor;
• wherein at least part of said outer teeth of said first timing belt is configured to directly engage with at least part of a second timing belt's teeth to thereby directly cause movement of said second timing belt in respect to said first timing belt, when said first timing belt is moved;
• and
• a second timing belt mechanism, comprising:
• at least two second pulleys;
• wherein at least one of said at least two second pulleys is activated by a second motor;
• and
• a third timing belt comprising outer teeth on the outer circumferential surface of said third timing belt, stretched around said at least two second pulleys and configured to be moved by said at least one of said at least two second pulleys activated by said second motor;
• wherein at least part of said outer teeth of said third timing belt is configured to directly engage with at least part of a fourth timing belt's teeth to thereby directly cause movement of said fourth timing belt in respect to said third timing belt, when said third timing belt is moved.