Picture framing supply companies sell dry mount films and supplies for
mounting pictures using a thin tissue-like glue sheet that is placed
between the picture and the mounting surface.  The sandwich is then
placed in a heated press that melts the glue and creates the bond.
There are several types of glue film and depending on the type, this
glue melts between 120 and 180 degrees F.

As part of this process, they sell a small Iron called a "Tacking Iron"
which has a Teflon coated surface about 3" long and 1 1/2" wide.  The
iron is mounted on a handle and has an adjustable thermostat that can
set the temperature anywhere from 100 to 350 degrees F.  I use this
device when gluing bellows cloth with hide glue as described by others
in this thread and it works great, just the right amount of heat to
flow the glue without burning or "wicking" the glue away from the
joint.  I have never tried gluing bellows cloth using the dry mount
tissue.  I am very happy with hide glue.

The iron is made by Seal Manufacturing and the one I have was purchased
from United Mfrs. Supplies (800) 645-7260.  It is called "Deluxe
Selector II Tacking Iron," Seal No. 2506.

There is another iron that looks something like this one that is used
for mounting hot glue backed veneer strips to plywood edges.  Although
this unit has an adjustable thermostat, the range of temperature for
this kind of application is 200 to 1100 degrees F.  I have not used
this device and am not sure if the thermostat will take it down to hide
glue melting temperatures.  Woodworker's supply sells this device.
(www.woodworker.com).

Bob Humes