Here's how the process works:
1. Winston rewrites the articles: He alters the text to conform to the Party's current line, often making up or omitting facts to create the desired narrative.
2. Pneumatic tube: Winston inserts the rewritten articles into a pneumatic tube, which carries them to the Records Department.
3. Archival replacement: In the Records Department, the rewritten articles replace the originals, erasing any evidence of the past that contradicts the Party's narrative.
This process is a core element of the Party's control over information and history. By rewriting the past, the Party ensures that its citizens remain ignorant of any alternative narratives and are unable to question its authority.