Window Requirements
Openwindowenvelopesarenotsupported.Patchedwindowtypescannothaveanypartofthewindow
abovethe"V" inthebackpaneloftheenvelope.Intheseenvelopes,thewindowshouldbelocated.75"
(19mm)minimumfromside,topandbottomoftheenvelope.
BottomwindowenvelopesarebecomingmoreprevalentduetocurrentUSsecurityconcerns.The
automatedprocessingrequirementsforthistypeofenvelopeneedtoberesearched.
Thepatchshouldbeaminimumof.25"(6.4mm)largerthantheopeningonallsides.
Thegluelineshouldbenomorethan.125"(3.2mm)fromtheinsideoftheopeningonallsides.All
windowpatchesshouldbeflat,ripplefreeandbondedwithin.0625"(1.6mm)ofthetopedgeofthepatch
materialandtopedgeofthewindowcutout(s).Ifthewindowpatchareais1/3ormoreofthetotalareaof
theenvelope'sfrontpanel,theenvelopemustbetested.
Forfront/backdoublewindowenvelopes,thewindowpatchescannotbeinoppositepositionsorthe
photocellswillseethroughtheenvelopes,(see the example here).
Specifications
Pitney Bowes Epic Select Operator Guide December,2017 Page 260 of 288