Appeal No. 1997-0233 Page 6
Application No. 08/266,558
envelope or the like, the sheet then being advanced into the
machine for adhering the beads to each other. In accordance
with Eweryd's invention, the machine includes a first sealing
zone 12 and a second
sealing zone 13, which are arranged at 90° to each other with
advancing means 36,38,34,47 for conveying the respective sheet
through the sealing zones. Each sealing zone has one or more
pairs of rotationally driven sealing discs 14,15,18,19,23,26.
Each pair of sealing discs includes a first disc 14,15,23
heated by heating means, and a second, preferably freely
rotating, disc 18,19,26 engaging against the first disc with a
pre-settable pressure. In this way there is heat transfer
from the first sealing disc to the second sealing disc so that
when a sheet folded to envelope configuration is taken through
the machine with the aid of the advancing means, the toner
beads situated in an advancing direction are first caused to
pass through the first sealing zone and the envelope is then
given a new advancing direction at 90° to the previous one,
the toner beads in the new direction being caused to pass
through the second sealing zone. As shown in Figure 5, the
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