Abstract: Apparatus for compressing packaging of articles such as insulation batts has a bomb-bay door arrangement for depositing successive batches of the articles in stacked relationship into a downwardly open chamber, and a pressure member movable around an endless path of movement for pressing the articles downwardly at the bottom of the chamber into compression space. A retainer is movable to and from a position overlying the compression space for retaining the articles in their compressed condition in the compression space until the pressure member moves downwardly again through the chamber to compress further articles into the compression space. A ram is provided for discharging the compressed articles from the compression space to a bagging apparatus.