EQUIPMENT

 
PRODUCT AND SERVICE


Closing ? Seaming ?
Closing of metal cans is performed by a can seamer. This machine seals the can bottom and lid to the can body. The seam that is formed in this process is leak-proof.
The metal food can is more than 200 years old. Today it remains one of the most economical, environmentally friendly and, above all, safest packaging forms.
   
History:
It all started in 1809 when frenchman Nicholas Appert had the idea of packing food into bottles, like wine. It was only in the early 1900s that double seaming was first applied.
The first modern cans were three-piece soldered cans. In 1963 the first two-piece cans were introduced and were received with enthusiasm because they typically used less steel. Today, grocery shoppers today can select from an array of easy-to-use and convenient metal packages, including: containers with twist-top, resealable lids, easy-open cans with pull-tab lids made with steel, aluminum or plastic and even distinct, easy-to-grasp metal cans shaped like bowls, kettles and even squares.
   
Environmental and nutritional benefits:
Environmental conscious consumers can rejoice because the food can is 100 percent recyclable. They’re recycling rate is more than two-and-a-half times higher than that of most other packaging options. Steel food containers can be recycled again and again without losing strength or quality. Once the cans are sealed and heat processed, the food maintains its high quality for more than two years.
     
Seaming:
The seam is made by mechanically overlapping the two layers to form a hook. Different parameters of the hook are measured and monitored to check the integrity of the seam under different conditions. The shape of the double seam is determined by the shape of the seamer roll profile and the relative position. During the can seaming process, the seamer chuck holds the can while the rolls rotate around it.
   
         Can , Tin Can General Dimensions

NAME

DIMENSIONS

Total Capacity, avoir oz. of Water at 68degF

No. 2 Can Equivalent

6 OZ

202 x 308

6.08

0.295

8 OZ Short

211 x 300

7.93

0.386

8 OZ Tall

211 x 304

8.68

0.422

No. I (Picnic)

211 x 400

10.94

0.532

No. 211 Cylinder

211 x 414

13.56

0.660

No. 300

300 x 407

15.22

0.741

No. 300 Cylinder

300 x 509

19.40

0.945

No. I Tall

301 x 411

16.70

0.813

No. 303

303 x 406

16.88

0.821

No. 303 Cylinder

303 x 509

21.86

1.060

No. 2 Vacuum

307 x 306

14.71

0.716

No. 2

307 x 409

20.55

1.000

Jumbo

307 x 510

25.80

1.2537

No. 2 Cylinder

307 x 512

26.40

1.284

No. 1.25

401 x 206

13.81

0.672

No. 2.5

401 x 411

29.79

1.450

No. 3 Vacuum

404 x 307

23.90

1.162

No. 3 Cylinder

404 x 700

51.70

2.515

No. 5

502 x 510

59.10

2.8744

No. 10

603 x 700

109.43

5.325

  The capacity of a 16-oz. glass jar is approximately No. 303 tin can.
  The capacity of a No. 2.5 glass jar is approximately the same as the No. 2.5 tin can.
    
 
Explanation of Dimensional Food Can Standards
Metal can sizes used in industry in the U.S.A. are derived from nominal outside dimensions. Measurements are made of the empty round can before seaming on the packers' end.
While such dimensions may be expressed in inches, the custom is to use a conventionalized method in which three-digit numbers are used to express each dimension. The first digit indicates the number of whole inches in a dimension, and the second and third digits indicate the fractional inches as sixteenths of an inch. Thus:
303 x 406 means 3-3/16 x 4-6/16 inches
307 x 512 means 3-7/16 x 5-12/16 inches
603 x 700 means 6-3/16 x 7 inches
The first three-digit number describing a round can indicates the diameter measured across the outside of the chime on the seamed end. The second three-digit number indicates the overall height of the can with one end on.
In stating the dimensions of oval, obround, or obrotund cans, outside dimensions are used, the dimensions of the opening stated first, followed by the height. Thus, there will be three sets of figures: the first two being the long and short axis of the opening. Their interpretation in inches and sixteenths of an inch is the same as with round cans. An oval can might have the size given as 402 x 304 x 612, which would mean that the oval opening was 4-2/16 x 3-4/16 inches and the height was 6-12/16 inches.
In the table below the "No.2 Equivalent" indicates the number of No.2 cans equal to each of the cans designated in Column 1.
   

202 Can Specifications

 ENDS
 Curl Diameter

2.340 ± .006

 Curl Height*

0.080 ± .005

 Curl Opening Diameter

2.270 Min.

 Countersink Depth

0.270 ± .005

 Countersink Radius

0.020 Ref.

 Countersink Diameter

1.913 Ref.

 Chuck Wall Angle

12° Ref.

 Panel Height

0.090 ± .005

 End Flange Width

0.215 Ref.

*BMC .083 Nominal

202 End Specifications

 CANS
 Body Outside Diameter*

2.602 ± .007

 Flange Radius

0.050 Ref.

 Flange Width

0.082 ± .008

 Flange Can Height

4.812 ± .015

 Flange Diameter

2.255 Max.

 Neck Plug Diameter

2.063 ± .007

 Neck Seaming Clearance

0.120 Min.

 Headspace

0.470 ± .020

    

   
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