# US 4,400,399 A · Method and an arrangement for feeding fish with a fodder

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- Number: US 4,400,399 A
- Document ID: US4400399A
- Status: Granted
- Kind: A
- Application number: 06/286,543
- Filed: 1981-07-24
- Granted: 1983-08-23
- Earliest claimed: 1976-03-24
- Assignees: Chemap AG
- Inventors: Hans Muller
- Web page: https://patentgrep.com/patent/US4400399A

## CPC

- A23K 50/80: for aquatic animals, e.g. fish, crustaceans or molluscs
- Y10S 426/805: Pet food for dog, cat, bird, or fish
- A23K: FODDER
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A method of feeding fish in a tank with water comprises the steps of forming in the fish tank a region for feeding fish, introducing into the region a water-stable fodder and forcedly moving the water in the fish tank so as to maintain the fodder floating in the feeding region. In an arrangement for performing the method means forming a feeding station, and means for forcedly moving water in the feeding station are provided. The method of the invention may also comprise the step of utilizing heat liberated during operation of a biological reactor for heating agitated water in the fish tank. A water-stable fish fodder comprises particulate nutrient matter and a protein-containing binder imparting substantial water stability to the fodder formed as a pallet. The binder may be admixed with or may outwardly cover the particulate nutrient matter.

## Claims

### Claim 1

A fish fodder which is not readily soluble in water, consisting of a gelatinless particulate nutrient matter; and a gelatin binder for said gelatinless particulate nutrient matter, said particulate nutrient matter and said gelatin binder being pelletized, said gelatin binder being soluble in warm water so as to facilitate manufacture of the pellet and swelling in cold water so as to improve attractiveness of the pellet to fish, said gelatin binder present in effective amounts to import substantial water stability to the pellet so as to prevent ready dissolution of the same in water while permitting the pellet to float.

### Claim 2 (depends on 1)

The fish fodder as defined in claim 1, wherein said particulate nutient matter comprises particulate nutrient ingredients, and said binder is admixed with said ingredients.

### Claim 3 (depends on 2)

The fish fodder as defined in claim 2, wherein said particulate nutrient matter together with said admixed binder forms a core of said pellet, said binder further forming a cover layer outwardly surrounding said core.

### Claim 4 (depends on 1)

The fish fodder as defined in claim 1, wherein particulate nutrient matter forms a core of said pellet, and said binder forms a cover layer outwardly surrounding said core.

### Claim 5 (depends on 1)

The fish fodder as defined in claim 1, wherein said binder is a substance selected from the group consisting of hardened gelatin and unhardened gelatin.

### Claim 6 (depends on 1)

The fish fodder as defined in claim 1, wherein said binder is a hardened binder.