3.2 - 3.3 - Blanket, Infeed, Splicing

Question 0

Bearers are

Answer 0

Hardened steel rings at end of plate & blanket cylinder

Most (not all) web offset presses have this

Question 1

Blanket to blanket is aka…

Answer 1

The building block of the press

Question 2

The plate gap on a web offset press is usually

Answer 2

0.25 - 0.5 inches

Question 3

Plate bending involves 3 variables

Answer 3

Amount of force
Rate at which force applied
Radius angle of bends

Question 4

Improper plate bending causes problems such as (3)

Answer 4

Misregister
Plate release when printing
Plate cracking

Question 5

Plate lockup is commonly

Answer 5

Spring loaded

Reel-rod lockup

Question 6

On web presses the plate gap is ________ than the blanket gap

Answer 6

Smaller

Question 7

Blankets come in several forms

Answer 7

Premounted bars
Prepunched blankets
Blankets for gapless presses

Question 8

Use press packing to control

Answer 8

Image length

Question 9

Im feed systems include

Answer 9

Roll stand
Spliced
Metering rolls
Dancer rolls
Lateral positions (web) guides

Question 10

Roll stand can hold ____ to _____ rolls of paper

Answer 10

1-4

Question 11

Roll stand is usually _____ in configuration

Answer 11

Inline

Question 12

Tension on web is required for quality printing T or F

Answer 12

True

Question 13

Excessive tension caused

Answer 13

Web breaks

Question 14

Tension is controlled _______

Answer 14

After roll stand and dancer roll and b4 first printing unit

Question 15

Describe Metering rollers process

Answer 15

3 rollers grip web in two nips to provide break pressure

Question 16

Purpose of Splicers

Answer 16

Join two web rolls

Allows non stop printing

Question 17

What are the 2 types of splicers

Answer 17

Flying paster

Zero-speed splicer

Question 18

A flying paster is

Answer 18

Splicer which makes a splice against an ex ping web while it’s moving
New roll is adhered using glue or double sided tape

Question 19

Zero speed splicer makes splice against roll when it’s

Answer 19

Stopped moving

Question 20

Press continuous to print at full speed during the zero speed splice to or f

Answer 20

True

Question 21

What is a festoon

Answer 21

A vertical series of free spinning steel rollers ….stores 80-100 ft of paper for several seconds of press run during these eo speed splicing process

Question 22

What three factors affect tension control

Answer 22

Tension
Length
Modulus of eleasticity - tendency of paper to stretch

Question 23

Web guiding is

Answer 23

Side lay controls which control lateral position of web before printing or folding

Question 24

Webs may be ______ guided or _______ guided

Answer 24

Centre

Edge

Question 25

Web cutoff is usually made by a

Answer 25

Rotating knife cutoff cylinder

Question 26

What are the 3 web break detectors

Answer 26

Mechanical (roller or finger)
Optical (infrared beam)
Pneumatic (air jet)

Question 27

RPL (relative print length) occurs along the ________ of web and RPW occurs along the ________ of web

Answer 27

Length, width