Actually exactly this problem occurs with my homemade laminator. It is
a copy machine fuser and has one aluminum roller (heated) and one
silicone rubber roller.
Because of the different material one side of the paper gets bent the
other doesn't causing misalignment.
The way i found to reduce the problem is to use a folded-over piece of
thin cardboard (cereal boxes work great) to envelope the stack. This
way i also don't need to glue anything.
I leave a few centimeters of spare paper along one edge, this allows
me to press the papers together there while inserting the PCB. When i
feed this edge first it works out most of the time.
Still, they don't always come out well. I very rarely make double
sided, so that is not much of a problem, but also the reason why i
haven't tweaked the process.
ST
On Wed, Dec 24, 2008 at 6:08 PM, jerrytr2.com <jerry@...> wrote:
>
> I was worried that the alignment could be off once I put the board
> in because the board is not of zero thickness. Maybe one sheet would
> stay straight and the other one take up all the bend needed to get
> around the PCB? But that turned out not to be the case. Each time I
> tried, the paper flawlessly bent - equal bend on both sheets.
>