Sealing tape problems?

Shofa

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Hello everybody.

I have a few questions abut leaking problems and sealing tapes, here i go:

Recently i have leaking problems with Hp 57 and 343, we have a machine that does the sealing and when it's broken we do it manualy untill the machine is repaired, about two mounths ago they start leaking and since then we have more and more leaked cartridges . My question is: why do the cartridges leak? we never changed the supplier for the sealing tape or the "settings" of the machine, the cartridges leak regardless if they are seald by hand or by machine.
It's the machine? it's us? is it the tape or the heat?

Please help.

Thanx.

P.S. hope u understand, i speak english quite well but the writing is not so good.

Peace!!
 
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