Folding Flashcards
The folding line is referred to as…
The fold
What’s the definition of folding
The sharp edge bending of paper under pressure at a prepared or unprepared bending point
Score paper 1st if…..
Going in along the edge
How many ‘pt’ needed to score edge
5-6pt needed to score edge
Purpose of folding
- Fold signatures 2. Fold to manageable size 3. To fit small receptacles 4. Create new functional products 5. Create interesting visual effects
What are the classifications of sheet machine folders?
- Knife folder principle 2. Buckle folder principle 3. Combination folding machine
What are the Methods of folding?
- Hand folding 2. Sheetfed machine folding
Tool used in hand folding
Bone folder
What can bone folders be made out of?
Plastics - less money Teflon - more expensive
What are the advantages of a Teflon bone folder
Doesn’t mark sheet easily more expensive softer more pliable
What are the advantages of knife folders?
- 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
What are the disadvantages of knife folders?
- Mechanically more complex 2. Less folding variability 3. Lower output as a function of speed
What are the advantages of buckle folders?
- High output 2. Good accuracy 3. High folding variability with multi folding station design
What are the disadvantages of buckle folders?
- Sensitive to light papers 2. Sensitive to paper with static electricity 3. High make ready time 4. Significant footprint
What are combination folders?
Folding machines with both buckle and knife folding systems (has vertical pile feeder)
Advantages of combination folders?
- 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)
Disadvantages of combination folding?
- Lower output 2. Numerous folding possibilities but not as varied as multi folding station buckle folding machines
What are the 5 types of feeders?
- 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
What folding principle is this?
Knife Folding Principle
What folding principle is this?
bucle folding principle
Describe this image.
combination folding machine
- has buckle plates
- splitter shaft
- folding rollers
what is this ?
rotary pile feeder
what is this?
stream feeder
what is this?
box suction feeder
what is this image of?
combined folding machine configuration
what are these
preforating tools for knife shafts
Describe the buckle fold principle…
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
Describe the knife folding principle….
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.
what are these?
types of folding rollers with homogenous and composite surfaces.
Name each preforrating tool.
(top left - bottom right)
- knife for prefforating back fold on folded sheet
- knife for preforrating a tear-off fold on sheet surface
- knife for prefforating fold at head of the fold sheet
- knife for punch prefforating in back of fold for preforation binding
