Examples from the Web for jelly bag
The quince pulp that remains in the jelly-bag can be made into marmalade.
Then pour it into the jelly-bag, and keep changing it till it comes clear.
Let it pass through the jelly-bag again—when cool, turn it into glasses.
Let it stand half an hour without touching it; then run it through a jelly-bag.
The very stout flannel called double-mill, used for ironing blankets, is a good material for a jelly-bag.Nelson's Home Comforts|Mary Hooper