Invidious
KOFA Flexo Printer Slotter & Box Line
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KOFA is a professional corrugated machinery manufacturer since 1984, specializing in high-performance flexo printer slotter die-cutter machines, corrugated box production lines, and intelligent packaging solutions.

We provide customized carton production equipment focusing on energy saving, high efficiency, and cost reduction. Our machines are trusted by carton factories worldwide for quality and reliability.

Subscribe to see machine demonstrations, installation training, customer case studies, and factory tours.

🌐 Official website: www.szkofa.com
📧 Contact us: info@szkofa.com


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0:32

Inside a Flexo Printer Factory | Printer Slotter Die Cutter Production Line Tour

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

8 views

0:41

Inside a Corrugated Box Machine Manufacturer in China | Full Production Line Demo

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

12 views

1:01

Top Flexo Printer Factory | High-Speed Corrugated Printing Line 2025

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

13 views

0:32

Top Corrugated Box Machine Manufacturer | 2025 High-Speed Production Line

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

3 views

0:43

Top Corrugated Machine Manufacturer for Packaging Plants (2025 New Model)

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

13 views

0:40

Flexo Corrugated Box Printing Machine | High Speed Printer Slotter Die Cutter Factory

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

10 views

0:38

Best Corrugated Machine Manufacturer for Packaging Plants | High Precision + Fast Delivery

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

24 views

0:53

Fully Automatic Carton Production Line with Servo Slotter & Die Cutter – KOFA Machinery

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

3 views

0:31

Eco-Friendly Water-Based Flexo Printing Machine – KOFA Machinery

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

10 views

0:24

Fully Automatic Carton Production Line with Servo Slotter – KOFA Machinery

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

17 views

0:44

Medium-Size Packaging Factory Flexo Printer Slotter – KOFA Machinery

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

21 views

0:53

High-Precision Corrugated Printing Line for Medium-Sized Carton Factories – KOFA Machinery

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

11 views

0:32

Automatic Printer Slotter Die Cutter Line for Box Factories – KOFA Machinery

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

8 views

0:36

High-Speed Multi-Color Corrugated Printing System – KOFA Machinery

KOFA Flexo Printer Slotter & Box Line

Shared 2 months ago

9 views

1:32

KOFA Flexo Corrugated Box Printing Machine | Real-Time AI Printing Quality Inspection System

KOFA Flexo Printer Slotter & Box Line

Shared 3 months ago

31 views

0:45

KOFA Flexo Corrugated Box Printing Machine | Flexo Printer Slotter Line – Full Speed Demonstration

KOFA Flexo Printer Slotter & Box Line

Shared 3 months ago

27 views

1:38

Flexo Corrugated Box Printing Machine – Daily Maintenance & Troubleshooting Guide

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

16 views

5:35

Flexo Corrugated Box Printing Machine Slotting Unit Demonstration

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

13 views

4:36

Flexo Corrugated Box Printing Machine Die Cutting Unit Demonstration

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

3 views

7:37

Flexo Corrugated Box Printing Machine Printing Unit Demonstration

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

12 views

3:56

Paper Feeding System of Flexo Corrugated Box Printing Machine

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

4 views

1:56

Flexo Corrugated Box Printing Machine – How to Start the Printing Line

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

16 views

0:44

High-Speed Corrugated Box Printing & Slotter Line for Medium Factories

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

6 views

0:24

Flexo Printer Slotter Die Cutter: Reduce Waste & Boost Efficiency

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

3 views

0:29

How to Choose the Right Corrugated Box Printing Line | FS1224 & FS1527 Comparison

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

4 views

0:17

Eco-Friendly Water-Based Inks in Corrugated Box Printing

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

6 views

1:21

Preventive Maintenance Tips for Flexo Printing & Slotter Die-Cutter Lines

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

14 views

0:57

Automated Corrugated Box Production Line for Small & Medium Factories

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

2 views

0:23

Improve Color Accuracy in Flexo Corrugated Printing | Pro Tips

KOFA Flexo Printer Slotter & Box Line

Shared 4 months ago

7 views

1:20

FS1527 Flexo Printing & Slotter Line – Maximize Production Efficiency

KOFA Flexo Printer Slotter & Box Line

Shared 5 months ago

10 views

Unable to parse item

Invidious encountered an error while trying to parse this item. For more information see below:

Show technical details 
Title: `Missing hash key: "collectionThumbnailViewModel" (KeyError)`
Date: `2026-02-08T19:39:36Z`
Route: `/channel/UCzc2IL9LjpAEWbSFFDOEPRg`
Version: `2026.02.07-91a7df4a @ master`

<details>
<summary>Backtrace</summary>
<p>
   
```
Missing hash key: "collectionThumbnailViewModel" (KeyError)
  from /home/invidious/crystal/share/crystal/src/hash.cr:1202:9 in '??'
  from /home/invidious/crystal/share/crystal/src/json/any.cr:149:5 in 'process'
  from src/invidious/yt_backend/extractors.cr:524:17 in 'process'
  from src/invidious/yt_backend/extractors.cr:1035:17 in 'parse_item'
  from src/invidious/yt_backend/extractors.cr:1082:14 in 'extract_items'
  from src/invidious/channels/videos.cr:32:12 in 'get_60_videos:continuation:sort_by'
  from src/invidious/routes/channels.cr:56:36 in 'videos'
  from lib/kemal/src/kemal/route.cr:13:9 in '->'
  from src/invidious/helpers/handlers.cr:31:37 in 'call'
  from lib/kemal/src/kemal/filter_handler.cr:22:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/request_processor.cr:51:11 in 'handle_client'
  from /home/invidious/crystal/share/crystal/src/fiber.cr:170:11 in 'run'
  from ???
```
</p>
</details>

Unable to parse item

Invidious encountered an error while trying to parse this item. For more information see below:

Show technical details 
Title: `Missing hash key: "collectionThumbnailViewModel" (KeyError)`
Date: `2026-02-08T19:39:36Z`
Route: `/channel/UCzc2IL9LjpAEWbSFFDOEPRg`
Version: `2026.02.07-91a7df4a @ master`

<details>
<summary>Backtrace</summary>
<p>
   
```
Missing hash key: "collectionThumbnailViewModel" (KeyError)
  from /home/invidious/crystal/share/crystal/src/hash.cr:1202:9 in '??'
  from /home/invidious/crystal/share/crystal/src/json/any.cr:149:5 in 'process'
  from src/invidious/yt_backend/extractors.cr:524:17 in 'process'
  from src/invidious/yt_backend/extractors.cr:1035:17 in 'parse_item'
  from src/invidious/yt_backend/extractors.cr:1082:14 in 'extract_items'
  from src/invidious/channels/videos.cr:32:12 in 'get_60_videos:continuation:sort_by'
  from src/invidious/routes/channels.cr:56:36 in 'videos'
  from lib/kemal/src/kemal/route.cr:13:9 in '->'
  from src/invidious/helpers/handlers.cr:31:37 in 'call'
  from lib/kemal/src/kemal/filter_handler.cr:22:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/request_processor.cr:51:11 in 'handle_client'
  from /home/invidious/crystal/share/crystal/src/fiber.cr:170:11 in 'run'
  from ???
```
</p>
</details>

Unable to parse item

Invidious encountered an error while trying to parse this item. For more information see below:

Show technical details 
Title: `Missing hash key: "collectionThumbnailViewModel" (KeyError)`
Date: `2026-02-08T19:39:36Z`
Route: `/channel/UCzc2IL9LjpAEWbSFFDOEPRg`
Version: `2026.02.07-91a7df4a @ master`

<details>
<summary>Backtrace</summary>
<p>
   
```
Missing hash key: "collectionThumbnailViewModel" (KeyError)
  from /home/invidious/crystal/share/crystal/src/hash.cr:1202:9 in '??'
  from /home/invidious/crystal/share/crystal/src/json/any.cr:149:5 in 'process'
  from src/invidious/yt_backend/extractors.cr:524:17 in 'process'
  from src/invidious/yt_backend/extractors.cr:1035:17 in 'parse_item'
  from src/invidious/yt_backend/extractors.cr:1082:14 in 'extract_items'
  from src/invidious/channels/videos.cr:32:12 in 'get_60_videos:continuation:sort_by'
  from src/invidious/routes/channels.cr:56:36 in 'videos'
  from lib/kemal/src/kemal/route.cr:13:9 in '->'
  from src/invidious/helpers/handlers.cr:31:37 in 'call'
  from lib/kemal/src/kemal/filter_handler.cr:22:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/request_processor.cr:51:11 in 'handle_client'
  from /home/invidious/crystal/share/crystal/src/fiber.cr:170:11 in 'run'
  from ???
```
</p>
</details>

Unable to parse item

Invidious encountered an error while trying to parse this item. For more information see below:

Show technical details 
Title: `Missing hash key: "collectionThumbnailViewModel" (KeyError)`
Date: `2026-02-08T19:39:36Z`
Route: `/channel/UCzc2IL9LjpAEWbSFFDOEPRg`
Version: `2026.02.07-91a7df4a @ master`

<details>
<summary>Backtrace</summary>
<p>
   
```
Missing hash key: "collectionThumbnailViewModel" (KeyError)
  from /home/invidious/crystal/share/crystal/src/hash.cr:1202:9 in '??'
  from /home/invidious/crystal/share/crystal/src/json/any.cr:149:5 in 'process'
  from src/invidious/yt_backend/extractors.cr:524:17 in 'process'
  from src/invidious/yt_backend/extractors.cr:1035:17 in 'parse_item'
  from src/invidious/yt_backend/extractors.cr:1082:14 in 'extract_items'
  from src/invidious/channels/videos.cr:32:12 in 'get_60_videos:continuation:sort_by'
  from src/invidious/routes/channels.cr:56:36 in 'videos'
  from lib/kemal/src/kemal/route.cr:13:9 in '->'
  from src/invidious/helpers/handlers.cr:31:37 in 'call'
  from lib/kemal/src/kemal/filter_handler.cr:22:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/handler.cr:30:7 in 'call'
  from /home/invidious/crystal/share/crystal/src/http/server/request_processor.cr:51:11 in 'handle_client'
  from /home/invidious/crystal/share/crystal/src/fiber.cr:170:11 in 'run'
  from ???
```
</p>
</details>