Velocity Reviews > Off topic - How can a piece of paper be charged when printing?

# Off topic - How can a piece of paper be charged when printing?

dandelion
Guest
Posts: n/a

 03-30-2006
It's said the transfer corona in a laser printer positively
charges the paper. The paper then attracts the negatively
charged toner particles to itself. How can a piece of
paper, a non-metal material, be charged? If so, does it
mean if we want, we can charge anything, a piece of wood, an
egg, an apple, a porcelain cup?

JohnO
Guest
Posts: n/a

 03-30-2006

dandelion wrote:
> It's said the transfer corona in a laser printer positively
> charges the paper. The paper then attracts the negatively
> charged toner particles to itself. How can a piece of
> paper, a non-metal material, be charged? If so, does it
> mean if we want, we can charge anything, a piece of wood, an
> egg, an apple, a porcelain cup?

Yeah, sort of.

Have you ever done that experiment where you tear a piece of paper into
little tiny pieces, then run a plastec comb through your hair, and the
comb will pick up some of the paper?

Some materials hold charges better than others, and paper is good
enough at the high charges used by laser printers. Some, like porcelain
and the common insulators used around electrical things, don't hold
charges well, if at all. It has to do with the number of free electrons
in the material, and some other stuff too.

-John O

Tom MacIntyre
Guest
Posts: n/a

 03-30-2006
On Thu, 30 Mar 2006 14:12:33 -0500, dandelion <(E-Mail Removed)>
wrote:

>It's said the transfer corona in a laser printer positively
>charges the paper. The paper then attracts the negatively
>charged toner particles to itself. How can a piece of
>paper, a non-metal material, be charged? If so, does it
>mean if we want, we can charge anything, a piece of wood, an
>egg, an apple, a porcelain cup?

Rub an inflated balloon on a sweater you are wearing and it will stick
to a wall for awhile.

Tom

J. Clarke
Guest
Posts: n/a

 03-30-2006
dandelion wrote:

> It's said the transfer corona in a laser printer positively
> charges the paper. The paper then attracts the negatively
> charged toner particles to itself. How can a piece of
> paper, a non-metal material, be charged? If so, does it
> mean if we want, we can charge anything, a piece of wood, an
> egg, an apple, a porcelain cup?

Pet a cat on a cold day. That crackling sound is high voltage.

Anything can be given a static charge. If it's a conductor the charge
rapidly equalizes across the surface and bleeds off to the first ground
encountered. If it's a nonconductor then the charge stays put for a while.
Paper is a nonconductor so it will hold a charge for a while.

--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)

smackedass
Guest
Posts: n/a

 03-30-2006

Better yet, since laser printers have been around for, how many years now?
just take their word for it. If you want to know how or why it's true, I'm
sure you can Google around for the info.

smackedass

SBFan2000
Guest
Posts: n/a

 03-31-2006
Actually both the drum and the paper are negatively charged. Its just that
the paper is at a higher negative charge then the drum, thus the toner is
attracted. In some printers and most copiers there is also a separation
corona that attracts the paper to itself so that the paper does not wrap
around the drum. P.S. The Drum, or OPC, is an insulator in the dark and a
conductor in the light!

Glenn

"dandelion" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> It's said the transfer corona in a laser printer positively
> charges the paper. The paper then attracts the negatively
> charged toner particles to itself. How can a piece of
> paper, a non-metal material, be charged? If so, does it
> mean if we want, we can charge anything, a piece of wood, an
> egg, an apple, a porcelain cup?
>

Glenn
Guest
Posts: n/a

 04-01-2006
eVER WALK ACROSS A CARPET AND REACH OUT TO A DOORKNOB AND GET ZAPPED?
tHAT'S ABOUT 700 VOLTS. (it takes less 50 volts to zap CMOS) the Carpet
isn't metal and the door usually isn't metal. Remember in high school
science the hard rubber wand and the furry cat skin???

dandelion wrote:

> It's said the transfer corona in a laser printer positively
> charges the paper. The paper then attracts the negatively
> charged toner particles to itself. How can a piece of
> paper, a non-metal material, be charged? If so, does it
> mean if we want, we can charge anything, a piece of wood, an
> egg, an apple, a porcelain cup?
>

Tom MacIntyre
Guest
Posts: n/a

 04-01-2006
On Sat, 01 Apr 2006 00:10:25 GMT, Glenn <(E-Mail Removed)> wrote:

>eVER WALK ACROSS A CARPET AND REACH OUT TO A DOORKNOB AND GET ZAPPED?

No...more like 3500+ before it is felt by the average person.

Tom

>(it takes less 50 volts to zap CMOS) the Carpet
>isn't metal and the door usually isn't metal. Remember in high school
>science the hard rubber wand and the furry cat skin???
>
>
>dandelion wrote:
>
>> It's said the transfer corona in a laser printer positively
>> charges the paper. The paper then attracts the negatively
>> charged toner particles to itself. How can a piece of
>> paper, a non-metal material, be charged? If so, does it
>> mean if we want, we can charge anything, a piece of wood, an
>> egg, an apple, a porcelain cup?
>>