What are the advantages and disadvantages of photo printers?

Answer 1

Wow, line printers... Many now in museums.

Advantages? They're very fast and also impact printers. If your needs require multi-part forms, then you must use an impact printer, either dasiy wheel or dot matrix.

Typical main-frame line printers (IBM) use a metal "band saw" character loop, and solenoids for each character position, typically 132 columns. The band spins at several RPS and as each letter aligns with the column it's intended to be, the solenoid, or hammer behind that column fires striking the letter through the ink ribbon, onto the paper.

The speed is obvious. Since each letter passes each column several times per second, the entire line of print can be struck at once. 10 lines per second is typical and the sound is quite high; necessitating heavy sound insulation.

Disadvantages:

The standard "line printer" can only use pin feed paper, cannot use other than standard widths {17"} typical, and is pretty specialized to the system being used. No color other than black.

Summarizing:

They're very fast, faster than most other technology, can print multi-part forms, something only impact printers can do, are large, loud, and something not available in the general retail system. An office desk takes up the same or less space.

Watching one print 10 lines per second, entire lines at once is impressive.

Oh a final disadvantage: price. They're not your $99 home photo printer! About 4 digits last I checked (mid 80's, IBM system 34/36, slower and less RAM, HDD space then a standard desktop! - but multi-user, mutitasking - with green on black monitors)

Answer 2

Advanatges:

* Quick and easy production of printing plates

* High image quality

* The plates last for long time

Disadvantages:

* Not perfect for short prints run

* Time and cost leads to small quantity printing jobs

* Plates can become sensitive

Answer 3

The advantage of digital printing is that it provides the ability to print high quality full color or photographic images with no minimum quantity required for an order. The only disadvantage is that, in order to achieve color accuracy, digital printing can currently only be used on white or light colored garments.

Answer 4

Letterpress printing uses raised, inked, reversed images pressed against paper to create a properly oriented picture or page of text. The raised image can then be re-inked and used again, repeatedly, to make multiple copies of the same picture or page of text. While commercial printers favor other printing processes because of their flexibility and low costs, letterpress printers still thrive in some niche printing markets such as formal event invitations

Answer 5

ink jet printer are less expensive as compare to laser jet

u can do colour printing with ink jet

dis adventages is that the speed of printing is less

if the cartriges got used they r very costly

to replace them

laser printers r very fast to print

Answer 6

Roller printing machinesIn its simplest form the roller-printing machine consists of a strong cast iron cylinder mounted in adjustable bearings capable of sliding up and down slots in the sides of the rigid iron framework. Beneath this cylinder the engraved copper roller rests in stationary bearings and is supplied with colour from a wooden roller that revolves in a colour-box below it. The copper roller is mounted on a stout steel axle, at one end of which a cogwheel is fixed to gear with the driving wheel of the machine, and at the other end a smaller cogwheel to drive the colour-furnishing roller. The cast iron pressure cylinder is wrapped with several thicknesses of a special material made of wool and cotton lapping, the object of which is to provide the elasticity necessary to enable it to properly force the cloth to be printed into the lines of engraving.

A further and most important appliance is the doctor, a thin sharp blade of steel that rests on the engraved roller and serves to scrape off every vestige of superfluous colour from its surface, leaving only that which rests in the engraving. On the perfect action of this doctor depends the entire success of printing, and as its sharpness and angle of inclination to the copper roller varies with the styles of work in hand it requires an expert to get it up (sharpen it) properly and considerable practical experience to know exactly what qualities it should possess in any given case. In order to prevent it from wearing irregularly it is given a to-and-fro motion so that it is constantly changing its position and is never in contact with one part of the engraving for more than of brass or a similar alloy is frequently added on the opposite side of the roller to that occupied by the steel or cleaning doctor; it is known technically as the lint doctor from its purpose of cleaning off loose filaments or lint, which the roller picks off the cloth during the printing operation. The steel or cleaning doctor is pressed against the roller by means of weighted levers, but the lint doctor is usually just allowed to rest upon it by its own weight as its function is merely to intercept the nap which becomes detached from the cloth and would, if not cleaned from the roller, mix with the colour and give rise to defective work.

Larger machines printing from two to sixteen colours are precisely similar in principle to the above, but differ somewhat in detail and are naturally more complex and difficult to operate. In a twelve-colour machine, for example, twelve copper rollers, each carrying one portion of the design, are arranged round a central pressure cylinder, or bowl, common to all, and each roller is driven by a common driving wheel, called the crown wheel, actuated, in most cases, by its own steam-engine or motor. Another difference is that the adjustment of pressure is transferred from the cylinder to the rollers which works in specially constructed bearings capable of the following movements: Of being screwed up bodily until the rollers are lightly pressed against the central bowl; of being moved to and fro sideways so that the rollers may he laterally adjusted; and of being moved up or down for the purpose of adjusting the rollers in vertical direction. Notwithstanding the great latitude of movement thus provided each roller is furnished with a box-wheel, which serves the double purpose of connecting or gearing it to the driving wheel, and of affording a fine adjustment. Each roller is further furnished with its own colour-box and doctors.

With all these delicate equipments at his command a machine printer is enabled to fit all the various parts of the most complicated patterns with an ease, dispatch and precision, which are remarkable considering the complexity and size of the machine.

In recent years many improvements have been made in printing machines and many additions made to their already wonderful capacities. Chief amongst these are those embodied in the Intermittent and the Duplex machines. In the former any or all of the rollers may be moved out of contact with the cylinder at will, and at certain intervals. Such machines are used in the printing of shawls and sarries for the Indian market. Such goods require a wide border right across their width at varying distances sometimes every three yards, sometimes every nine yards and it is to effect this, with rollers of ordinary dimensions, that intermittent machines are used. The body of the sarrie will be printed, say for six yards with eight rollers; these then drop away from the cloth and others, which have up to then been out of action, immediately fall into contact and print a border or crossbar, say one yard wide, across the piece; they then recede from the cloth and the first eight again return and print another six yards, and so on continually.

The Duplex or Reversible machine derives its name from the fact that it prints both sides of the cloth. It consists really of two ordinary machines so combined that when the cloth passes, fully printed on one side from the first, its plain side is exposed to the rollers of the second, which print an exact duplicate of the first impression upon it in such a way that both printings coincide. A pin pushed through the face of the cloth ought to protrude through the corresponding part of the design printed on the back if the two patterns are in good fit.

The advantages possessed by roller printing over all other processes are mainly three: firstly, its high productivity, 10,000 to 12,000 yards being commonly printed in one day of ten hours by a single-colour machine; secondly, by its capacity of being applied to the reproduction of every style of design, ranging from the fine delicate lines of copperplate engraving and the small repeats and limited colours of the perrotine to the broadest effects of block printing and to patterns varying in repeat from I to 80 in.; and thirdly, the wonderful exactitude with which each portion of an elaborate multicolour pattern can be fitted into its proper place, and the entire absence of faulty joints at its points of repeat or repetition consideration of the utmost importance in fine delicate work, where such a blur would utterly destroy the effect.

Answer 7

So when you are doing a computer studies lesson you come and find your answer here :P

Answer 8

Some advantages are no toner cartridge to clean and you can copy in multiple depths. Disadvantages are no printing on the back, no collating, and they are noisy.

Answer 9

go suck your self

Answer 10

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