CA1238554A - Underwater trap for marine life - Google Patents

Underwater trap for marine life

Info

Publication number
CA1238554A
CA1238554A CA000545582A CA545582A CA1238554A CA 1238554 A CA1238554 A CA 1238554A CA 000545582 A CA000545582 A CA 000545582A CA 545582 A CA545582 A CA 545582A CA 1238554 A CA1238554 A CA 1238554A
Authority
CA
Canada
Prior art keywords
trap
plastic
wire mesh
portions
wire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000545582A
Other languages
French (fr)
Inventor
John B. Davis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ATLANTIC COATED WIRE Ltd
Original Assignee
ATLANTIC COATED WIRE Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ATLANTIC COATED WIRE Ltd filed Critical ATLANTIC COATED WIRE Ltd
Priority to CA000545582A priority Critical patent/CA1238554A/en
Application granted granted Critical
Publication of CA1238554A publication Critical patent/CA1238554A/en
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K69/00Stationary catching devices
    • A01K69/06Traps
    • A01K69/08Rigid traps, e.g. lobster pots

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)

Abstract

ABSTRACT OF THE DISCLOSURE

Plastic coated metal wire mesh underwater traps for marine life, such as lobster traps, and a method of making same. The method comprises forming wire portions of the trap from uncoated metal wire mesh and securing together these portions to assemble them in proper locations to form the main body of the trap. The assembled wire portions of the trap are then coated with plastic to completely encase the wire thereof. The plastic coating has structural capacity enhancing that of the secured together metal wire mesh portions of the trap. A trap of enhanced structural rigidity which is better able to resist the corrosive underwater environment is thus produced according to this invention.

Description

~L~23~355~2 B~CKGROU~p OF T~IE INVEWTION

The p~esent invention relates to imeroved plastic coated metal wire mesh undeLwater traps for marine life and a method of ~aking same. More particularly the present invention Lelates to undecwatèr traps such as lobster traps.
Conventionally, metal wire mesh underwater traps such as ]obster traps are made by cutting appropriate ~ire portions from a roll of coated wiLe mesh (such as plastic coated steel wiLe mesh), forming such portions into the desired shapes, for example, for the body, end~ and bridge tif a lobster tra~ is being manuactured), clieping these portions in theiL proper relative locations either by bending free ends of the wire mesh of one portion over the wires of the mesh of an adjacent portion OL by using metal clies to clip together adjacent eortions, and then forming the aeproeriate oeenings, installing the gate or door to the trae, and, in the case of a lobster trae, installing the side (or kitchen) heads and earlor heads which guide the lobster entering the trap body ancl erevent it e~om escaeing thereerom. ~t eresent all wire mesh sold for lobster trap productlon is p.v.c. coated.
While lobster traps manufactured acco~ding to such conventional methods are currently very eopular, they suffer Geveral serious drawhacks. Firstly, the ends of the wire mesh eortions making ue the main body of the trap Oe necessity have metal (steel) exposed to the environment. This results in such .. ~

~3~35~

traps tending to coLeode relatively quickly because of the coLLosive, undeLwater envilonment to which they are exposed.
~lso these exposed encls tend to cut clothing and gloves. As well, when adjacent coated wire mesh portions are clamped togetheL with metal (e.cJ. aluminium~ clies, the clips o-ften cut the plastic coating eY~posing more of the metal wi~e of the ;nesh to cotrosion and thus ceducing trap life. If, instead of clamps, the ends of the wires of the mesh aLe folded over adjacent E)octions of wiLe mesh to secure the two adjacent eortions in place, the radical bend being ae~lied to the ends Oe the wires causes the coating to stretch and thin out on the outside edcJe o the curve that is being formed. This reduction in thickness reduces the ability of the coating to withstand scuffing and abrasions. Since the outside edges and corners of the trap are the areas which would sustain the most damage in use, and it is these outside edges and corners of the trap where such Ladical bends are required, the conventional method of clameing tends to put the least amount of coating on the most ctitical and abused points of the trap.

It is an object of the present invention to erovide an improved plastic coated metal wire mesh underwater trap for marine life which avoids oc reduces many of the eroblems of tcaLs made acco~dincJ to such conventional -techniques, and to ~rovide a method of making such improved traes.

~23~
SUMMA~ OF THE IW ~NTIO~

According to the present invention there is provided a method of makin~ plastic coated metal wire mesh underwater traps for marine life, such as lobster traps. The method comprises forming wire portions of the trap from uncoated metal wire mesh and securing together these portions to assemble them in proper locations to form the main body of the trap. The assembled ~ire portions of the trap are then coated to completely encase the wire thereof with plastic so that the structural capacity of the plastic coating enhances that of the secured together metal wire mesh portions of the trap.
In a preferred embodiment of the present invention, the assembled wire portions of the trap are coated by means of an electrostatic airless spray coating process. When the coating step is completed, it is preferred that the trap be subjected to a heatin~ step to set and bond the plastic to the metal.
The invention further comerises traps made accordin~
to this process.
Traps such as lobster traps made in accordance with the present invention have severaL advantages over pLastic coated metal wire mesh traps made according to conventional methods~ Firstly, because the coatin~ of the wire mesh takes place after the wire portions of the trap have been assembled, there is no exposure of raw metal on wire ends to the ~2~3~55~

corrosive, saline, underwater environment. Thus, traps manufactured according to the method of the present invention have increased trap life. ~s well, the use of the electrostatic airless spray pLocess to coat the metal wire mesh according to the present invention enables a relatively uniform thickness of coating on all parts of the wire mesh including on outside edges and corners of the trap where ands of wirQs may have been bent over to secure and place adjacent portions of wire mesh.

Thirdly, and perha~s most importantly, because the wire mesh is coated after construction of the main body of the trap, the structural capacity of the coating material is used in combination with that of the metal of the mesh and, where used, metal clies or clamps, to enhance the stLuctural rigidity of the trap which is fo~med according to the method oE the present in~ention. In the past, because wire mesh in all instances was coated prior to the construction of the trap, this important structural potential of the coating material was lost. The coating for its intended application, lobster trap or otherwise, was simply to protect the mesh and no structural capaci~:y was attributed to it. In the method according to the present invention, a synergist;c increase in the strength and structural integrity o~ the trap results when the wice edges, which aLe secured together by clamping or otherwise, are then coated. As the coating hardens o~er any two parallel wires secured together, it fuses them together adding eurther ~%3~5~4 strength and stopping the chaffing which would othecwise oceur while the trap was in use. Thus, the strength and life expectancy of the trap are greatly increased without increasing its land weight or increasing the gauge of wire used or the overall cost of the material in the trap. In other words, while altering the traditional technology by changing the order of the procedures by which the trap is made, a stronger and longer-lasting product in accordance with the present inventio~
has suprisingly resulted.

BRIEF DESCRIPTION OF T~E DRAWINGS

These and other objects and advantages of the invention will become apparent upon reading the following detailed description and upon referring to the drawings in which:
E'IGURE l is a schematic, perspective view of a plastic coated metal wire mesh underwatec lobster trap o~ the type to which the present invention is diceeted; and E'IGURE 2 is an enlarged, partial view in perspective of elipped together adjacent portions of a wire mesh lobster trap manufactured according to conventional methods; and F'L~URE 3 i6 an enlarged, partial view in perspective of clipped together adjacent portions of a wire mesh lobster trap manu~actured according to the method of the present invention.

~23~35S9~
While the invention will be described ln conjunction with an example embodiment, it will be understood that it is not intended to limit the invention to such embodimerlt. On ~he contrary, it is intended to cover all alternatives, modifications and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims. For example, in this regard, the method and product of the present invention, while described particularly with respect to lobster traps, may be equally well applied to shrimp, crab and eel traps, and the like.

DETAILED DESCRIPTION OF THE INVENTION

Turning to the drawinys, there is illustrated a plastic coated steel wire mesh lobster trap, of conventional shape, to which the method of the present invention is particularly well-suited. The trap 2 comprises a body ~ having a base 6 and sides ~ formed Prom a single rectangular strip of pLefe~ably galvanized steel wire mesh. To body ~ are secured, by me~ns of clips 10 (F'IGU~E 2) or by bencling ends of wire over adjacent portions are end postions 12 and bridge portion l~.
Appropriate holes are cut in sides B ~or conventional kitchen (or side) heads 16 and parlor heads l~. A pivoting door 20 is fastened to a portion o~ body g to cover the opening over which bridge lg extends on the side of body g opposite ba6e 6.

~L;2 3~ 5~

Many of the problems with conventional construction oE
SUC~I traps, in which the wire mesh portions of the trap are formed from plastic coated mesh are illustrated in FIGU~E 2.
Clips 10, for example holding end 12 to side ~, can bite into the plastic coating of the wire mesh to cut the coating and thus reduce trap life. WheLe ends of wire of mesh from end portion 12 are bent over the wire of adjacent base 6, -the coating of the mesh on the bends will be understood to be thinned on the outer sides of the bends. As well, those ends will each have exposed metal. Also, because the wire is coated prior to trap construction, it can be seen that no benefit from the structural potential of the coating of the wire is attained.
In the corresponding portion of trap 2 illustrated in FIGURE 3, made according to the peocess oE the present invention, clips lO are secured directly on the metal of the mesh and ends of the wire from end portion 12 are bent o~er the wire of the adjacent base 6 before coating with plastic. Tn this manner all of the metal of the mesh and clips 10 are completely shielded from the corrosive saline environment of the ocean when the trae is in use. Also, the structueal potential of the coating material i~ taken advantage Oe. When the wires of side 6 and end 12 which are adjacent to each other are clamped o~ o~herwise secured together and then coated, as the coating hardens ovee them, it fuses adjacent wires together, thereby adding stren~th and stopping the chaEfing which would otherwise occur when the trap was in use. As . . .
, , .

previously indicated, this process thus greatly increases the strength and life expectancy oE ~he trap without increasing its land weight or increasing the gauge o-E the wire used Gr inceeasing the overall cost of the material in the trap.
It is preferLed, in accordance with the present invention, to use a recently developed method of coating the wire mesh which method is called electrostatic airless spraying. It is preferLed that the coating material be an epoxy/polyester material which is more flexible and has better scuff and corrosive resistant qualities than previously used p.v.c. compositions. According to the electrostatic airless seray method, a seray of powdered coating material is delivered simultaneously from computer controlled guns onto the subject wire mesh trap frame which is approeriately mounted in a vacuum work area. When appropriate powder has been delivered to the mesh of the trap, the trap is then moved to a heating booth where the epoxy/polyester coating is cured and securely bonded to the wire. The method according to the present invention eliminates all exeosed ends of wire as well a6 eroviding uniform thickness and increased bonding capacity on the wire body o~ the trap. The structural capacity of the COatirlg material is u~ed in combination with that of the wire to provide the greatly increased strength achieved in the trap made in accordance with the present invention.

Of course, once the metal mesh of the trap 2 has been coated in accordance with the present in~ention, appropriate g ~23~ii5~

kitchen heads 16, parlor head 18 and door 20 can be installed in the lobster trap in conventional fashion.
Thus it is apparent that there has been provided in accordance with the invention an improved underwater trap for marine life that fully satisfies the objects, aims and advantages set forth above. While the invention has been described in conjunction with a specific embodiment thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the lQ foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications and variations as fall within the s~irit and broad scope of the invention.

Claims (10)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS-
1. A method of making plastic coated metal wire mesh underwater traps for marine life which comprises the steps of:
(a) forming wire portions of the trap from uncoated metal wire mesh;
(b) securing together these portions to assemble them in proper locations to form the main body of the trap:
(c) coating the assembled wire portions of the trap to completely encase the wire thereof with plastic so that the structural capacity of the plastic coating enhances that of the secured together metal wire mesh portions of the trap.
2. A method according to claim 1 for making a lobster trap, the trap having a body made up of a formed rectangular base and sides, with a bridge portion and end portions secured thereto, the body, bridge and end portions being formed and assembled from uncoated metal wire mesh.
3. A method according to claim 1 wherein the wire mesh is made of galvanized steel wire.
4. A method according to claim 2 wherein the plastic is an epoxy/polyester plastic.
5. A method according to claim 3 wherein the plastic is an epoxy/polyester plastic.
6. A method according to claim 1 wherein the assembled wire portions of the trap are coated by means of an electrostatic airless spray coating process.
7. A method according to claim 6 wherein, after the electrostatic airless spray process has been completed, the coated wire portions of the trap are subjected to a heating step to set and bond the plastic to the metal.
8. A plastic coated wire mesh underwater trap for marine life formed according to the method of claim 1.
9. A plastic coated metal wire mesh lobster trap made according to the method of claim 2.
10. A plastic coated metal wire mesh lobster trap made according to the method of claim 6.
CA000545582A 1987-08-27 1987-08-27 Underwater trap for marine life Expired CA1238554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000545582A CA1238554A (en) 1987-08-27 1987-08-27 Underwater trap for marine life

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000545582A CA1238554A (en) 1987-08-27 1987-08-27 Underwater trap for marine life

Publications (1)

Publication Number Publication Date
CA1238554A true CA1238554A (en) 1988-06-28

Family

ID=4136352

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000545582A Expired CA1238554A (en) 1987-08-27 1987-08-27 Underwater trap for marine life

Country Status (1)

Country Link
CA (1) CA1238554A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2532574A (en) * 2014-09-22 2016-05-25 Riverdale Mills Corp Creel and method of making a creel for trapping crustaceans
US20210144980A1 (en) * 2019-11-20 2021-05-20 Mørenot Fishery As King crab or fish pot
GB2603172A (en) * 2021-01-29 2022-08-03 Fishtek Marine Ltd A trap

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2532574A (en) * 2014-09-22 2016-05-25 Riverdale Mills Corp Creel and method of making a creel for trapping crustaceans
US20210144980A1 (en) * 2019-11-20 2021-05-20 Mørenot Fishery As King crab or fish pot
US11553700B2 (en) * 2019-11-20 2023-01-17 Mørenot Fishery As King crab or fish pot
GB2603172A (en) * 2021-01-29 2022-08-03 Fishtek Marine Ltd A trap
GB2603172B (en) * 2021-01-29 2023-12-27 Fishtek Marine Ltd A trap

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