Graphic Design & Printing Technology

Graphic Design & Printing Technology

Successive or single sheet feeding:-

The most common type of

mechanical feeding is successive

sheet feeding system. In this system

the feeder unit picks up one sheet

each time the printing units prints

one sheet.

Continuous feeding or stream feeding:- In

stream feeder the sheets overlap on the

registration board and the rate of sheet

movement is significantly slower.

Registration is more accurate in stream

feeding.

Parts of feeding unit

Parts of feeding unit are pile feeder, pile board, pile height governor, sucker,
sheet separator fingers, sheet separation blower.

Pile feeder :- is a mechanism
used to lift individual sheets
from the pile and feed them
into the press.

Pile board :- It is a platform
in the feeder of a sheet fed
press on which the pile of
paper sits.

Pile height governor :- the
device used to control the
speed of elevation of the pile
table.

Sucker foot:- It is the element used in the feeding unit to pick up individual
sheets and place them into the registration unit. They are of two types- lifting

suckers and forwarding suckers.

Sheet separator fingers :-They are springy steel fingers extending over the
lead edge of the pile of paper in the feeder. Sheet seperators hold down the