ABSTRACT
Parameters on which clear prints depends were comprehensively investigated. The study revealed that clear print depends on the impressed pressure the working temperature and the gold foil print paper life expectancy. Also studies were he manner of dependence of these parameters on prints impressed on sheets of varied thickness. The results of these investigation were utizlied in the design and fabrication of an operational manual printing machine using gold foil sheet depositor clear prints were impressed on papers during the new machine’s operation.
LIST OF TABLES
11- Effect of temperature on sharpness of print.
111 – Description of (components) parts and materials use for them
1v- comparison of cost and properties of materials
LIST OF FIGURES
Figure 1 sketch of alternative A
Figure 2. Sketch of alternative B.
Figure 3 sketch of alternative C
Figure 4 isomeric view of hot plate square housing
Figure 5 isometric view of type holder
Figure 6 &7 load and free body diagram of crank are (Handle) and rod.
LIST OF SYMBOLS
A – Acceleration
D – Maximum shaft diameter
k – Thermal conductivity
c – Heat capacity
x – The pressure transmissibility of lever system (press x 1/duration )
t – Time
l – Length of shaft
m – Mass
m – Maximum bearding moment
p - Electric power
q – Quantity of heat
TABLE OF CONTENTS
CHAPTER ONE
CHAPTER TWO
CHAPTER THREE
CHAPTER FOUR
CHAPTER FIVE
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CHAPTER ONE
1.1 INTRODUCTION
Nigeria in recent times lays strong emphasis on mass literacy and indigenous technology. Printed matters are indispensable materials in mass literacy campaign and the trend towards indigenous technology imposes a severe clamp down on imputed engineering including printing block machinery. Thus the situation is such that make the acquisition of printing machinery from outside our boards extremely difficult.
Therefore to lessen the economic strain on the mass literacy campaign local production of printing machinery is apparently imperative. It is this fact that rendered integrative to the conception and realization of this low cost but efficient printing machine based entirely on local technology and resources.
The present machine is very useful in the printing of many items like paper backs cards etc. its design and fabrication is expected to motivate and advance the design and fabrication of other machines destined for similar purpose and based on indigenous technology and resources.
1.2 LITERATURE REVIEW AND DATA COLLECTION
There were no available books in printing in both the state and school libraries that actively dealt with printing technology. The only books available were those on the history of ‘Types’ and trade journals advertising products of foreign companies which were fund to be of little or no relevance.
However a visit to the government printing press gave us an opportunity to study the ‘types’ available and the basic operations of the giant printing (Blocking) machine with respect to the ‘Types’ from there we were able to establish;
Definition:
Types : These are the characters or alphabets that forms the letters.
Print :- This is the mark or impression produced on paper due to the types. Gold foil sheet depositor :- is a thin rectangular cellophane sheet coated with gold compound.
The print there must be impact force between two surfaces on e of which contains the ‘type’ and the other the paper on which print will be made. The force produces the necessary pressure for printing.
Consider alternati
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