Folding

Question 0

The folding line is referred to as…

Answer 0

The fold

Question 1

What’s the definition of folding

Answer 1

The sharp edge bending of paper under pressure at a prepared or unprepared bending point

Question 2

Score paper 1st if…..

Answer 2

Going in along the edge

Question 3

How many ‘pt’ needed to score edge

Answer 3

5-6pt needed to score edge

Question 4

Purpose of folding

Answer 4

1. Fold signatures 2. Fold to manageable size 3. To fit small receptacles 4. Create new functional products 5. Create interesting visual effects

Question 5

What are the classifications of sheet machine folders?

Answer 5

1. Knife folder principle 2. Buckle folder principle 3. Combination folding machine

Question 6

What are the Methods of folding?

Answer 6

1. Hand folding 2. Sheetfed machine folding

Question 7

Tool used in hand folding

Answer 7

Bone folder

Question 8

What can bone folders be made out of?

Answer 8

Plastics - less money Teflon - more expensive

Question 9

What are the advantages of a Teflon bone folder

Answer 9

Doesn’t mark sheet easily more expensive softer more pliable

Question 10

What are the advantages of knife folders?

Answer 10

1. Not sensitive to extreme paper weights/thickness 2. Average - Low makeready time 3. Good accuracy 4. Low space requirements 5. Can produce up to 128 page signature

Question 11

What are the disadvantages of knife folders?

Answer 11

1. Mechanically more complex 2. Less folding variability 3. Lower output as a function of speed

Question 12

What are the advantages of buckle folders?

Answer 12

1. High output 2. Good accuracy 3. High folding variability with multi folding station design

Question 13

What are the disadvantages of buckle folders?

Answer 13

1. Sensitive to light papers 2. Sensitive to paper with static electricity 3. High make ready time 4. Significant footprint

Question 14

What are combination folders?

Answer 14

Folding machines with both buckle and knife folding systems (has vertical pile feeder)

Question 15

Advantages of combination folders?

Answer 15

1. Less space - (than buckle folding machines ) 2. More inexpensive - (than buckle folding machines) 3. Paper with extreme characteristics = very light or very heavy can be folded more easily (than buckle folding machines)

Question 16

Disadvantages of combination folding?

Answer 16

1. Lower output 2. Numerous folding possibilities but not as varied as multi folding station buckle folding machines

Question 17

What are the 5 types of feeders?

Answer 17

1. Rotary pile feeder (round continuous feeder) 2. Vertical pile feeder (pile feeder/flat pile feeder) 3. Pallet feeders 4. Stream feeders 5. Box suction feeders

Question 18

What folding principle is this?

Answer 18

Knife Folding Principle

Question 19

What folding principle is this?

Answer 19

bucle folding principle

Question 20

Describe this image.

Answer 20

combination folding machine

• has buckle plates
• splitter shaft
• folding rollers

Question 21

what is this ?

Answer 21

rotary pile feeder

Question 22

what is this?

Answer 22

stream feeder

Question 23

what is this?

Answer 23

box suction feeder

Question 24

what is this image of?

Answer 24

combined folding machine configuration

Question 25

what are these

Answer 25

preforating tools for knife shafts

Question 26

Describe the buckle fold principle…

Answer 26

Bookbinding sheet is transformed though upper & lower folding roller into the buckle plate. Sheet bumps against buckle stop. Due to the movement of folding roller, buckle is created. *fold is created between the folding rollers

Question 27

Describe the knife folding principle….

Answer 27

Bookbinding sheet is fed between folding knife and folding roller. Folding knife joins sheet of the folding line between folding rollers. Between folding rollers, fold is made.

Question 28

what are these?

Answer 28

types of folding rollers with homogenous and composite surfaces.

Question 29

Name each preforrating tool.

(top left - bottom right)

Answer 29

1. knife for prefforating back fold on folded sheet
2. knife for preforrating a tear-off fold on sheet surface
3. knife for prefforating fold at head of the fold sheet
4. knife for punch prefforating in back of fold for preforation binding