Each and every have similar but not always identical meanings.

Each = every one separately
Every = each, all

Sometimes, each and every have the same meaning:

• Prices go up each year.
• Prices go up every year.

But often they are not exactly the same.

Each expresses the idea of 'one by one'. It emphasizes individuality.

Every is half-way between each and all. It sees things or people as singular, but in a group or in general.

Consider the following:

• Every artist is sensitive.
• Each artist sees things differently.
• Every soldier saluted as the President arrived.
• The President gave each soldier a medal.

Each can be used in front of the verb:

• The soldiers each received a medal.

Each can be followed by 'of':

• The President spoke to each of the soldiers.
• He gave a medal to each of them.

Every cannot be used for 2 things. For 2 things, each can be used:

• He was carrying a suitcase in each hand.

Every is used to say how often something happens:

• There is a plane to Bangkok every day.
• The bus leaves every hour.

I got this from:

 http://www.englishclub.com/grammar/adjectives-determiners-each-every.htm