M-40 OPERATOR & SERVICE MANUAL ISSUE 05/01 INTRODUCTION
071-27939-400 SECTION A – PAGE2
A.1 DESCRIPTION OF OPERATION
The GBR Systems Corp. M-40 is a high-speed paper-handling machine
designed to fold primary documents. The M-40 can feed, fold, glue and
perforate a preprinted sheet of paper, turning it into a ready-to-mail package.
Preprinted sheets are shingle stacked in the large capacity friction feeder.
The bottom sheet is fed from the stack and verified to be a single sheet. The
sheet is aligned and glue is applied to the sides. The sheet is then fed into
the folder where the leading end of the “C” folded sheet is glued. As the
sheet exits the folder, perforations are put into the sides. The finished mailer
is then shingle stacked on a take-away conveyor.
In the folder there are four buckle plates. Buckle plates number one and
three are located on the topside of the folder, numbers two and four are
located on the bottom side of the folder. They are called buckle plates
because they cause the paper to buckle in the folder rollers. When the sheet
reaches the buckle stop in the buckle plate, it is still being driven by the
previous set of folder rollers. Unable to continue traveling in the buckle plate,
the sheet bends, or buckles, inside of the folder rollers and is pinched by the
next set of rollers, making the fold in the sheet.
The folder rollers are located in the folder at the end of the transfer conveyor.
The paper travels down the transfer conveyer and enters the folder in
between the top two folder rollers. Before the sheet passes through these
rollers, glue is applied to the sides of the sheet. When the sheet reaches the
end of the first buckle plate, glue is applied to the lead edge and is pinched
between rollers #2 and #3 and driven into buckle plate #2. When the sheet
reaches the end of buckle plate #2 it is pinched between rollers #3 and #4
and driven out to the discharge rollers. As it passes between the discharge
rollers, rotary-perforating knives put the perforations into the sides of the
sheet. The sheet is discharged onto the Exit Conveyor where it is shingle
stacked. The folder rollers have two functions:
• They drive the paper through the folder
• They crease the paper where it is buckled
The M-40 is designed to securely seal open edges of a C-folded sheet of paper. To
assure that the sealed letter retains maximum integrity, the tear-off side seams are
glued and cross-seal (flap seal) are securely sealed with GBR’s proprietary, specially
formulated adhesive.
