" As a corrugator of 35 years standing, I am acutely aware of the problems associated with wet corrugated sheets produced in the conventional 3 rollers sheets pasting machines. In these machines it is difficult to control gum release as 1mm to 1.5mm thick gum bangles are formed on the gum application rollers.

These gum bangles not only apply excess gum on the corrugated liners but also appply gum on the inside of corrugated flutes which is not at all required, leading to production of wet corrugated sheets having washboard tendencies. Also in the 3 roller pasting machines the gum setting and pressure setting is not achieved properly because the setting has to be done from both sides of the machine, leading to uneven setting of glue as the setting is done manually.

Also  the 3 roller pasting machine, leads to higher gum release and wetter boards which take longer time to cure. The corrugated sheets produced on these pasting machines need curing time of 7 to 8 hours before they can be further processed.

   I have overcome the shortcomings of a 3 roller pasting machine by developing a 4 roller pasting machine in the year 1993. In this machine, pressure roller and gum application roller is set only from one side and the other side setting takes place automatically. Also the gum settings can be done very minutely and the gum is released exactly as per one's requirement. This is because all the rollers are balanced, geared and hard chrome plated with 0.02 accuracy . As a result the right quantity of gum is applied only on the  tips of the corrugated flutes resulting in drier corrugated sheets. Gloss impression of flute can be seen on top paper/board resulting in better finish having uniform adhesion which can be further processed after only 1 hour. Further, there is a saving  of 25% in gum consumption.

    Thus, in the 4 roller machine,faster production,excellent quality corrugated sheets and 25% gum saving is achieved and I am proud to serve our corrugatted industry better by developing this machine."

                                                                                       KALIPRASAD PODDAR